Make zuul the default sphinx domain

This lets us say "attr" instead of "zuul:attr".

Change-Id: Iaa6b3c7d6f4fc130445a258fea9f0e2f5dd8688b
diff --git a/doc/source/admin/drivers/gerrit.rst b/doc/source/admin/drivers/gerrit.rst
index bc203cb..6467bd5 100644
--- a/doc/source/admin/drivers/gerrit.rst
+++ b/doc/source/admin/drivers/gerrit.rst
@@ -192,14 +192,14 @@
 named *my-gerrit* must have a Code Review vote of +2 in order to be
 enqueued into the pipeline.
 
-.. zuul:attr:: pipeline.require.<gerrit source>
+.. attr:: pipeline.require.<gerrit source>
 
    The dictionary passed to the Gerrit pipeline `require` attribute
    supports the following attributes:
 
    .. _gerrit-pipeline-require-approval:
 
-   .. zuul:attr:: approval
+   .. attr:: approval
 
       This requires that a certain kind of approval be present for the
       current patchset of the change (the approval could be added by
@@ -207,24 +207,24 @@
       which are optional and are combined together so that there must
       be an approval matching all specified requirements.
 
-      .. zuul:attr:: username
+      .. attr:: username
 
          If present, an approval from this username is required.  It is
          treated as a regular expression.
 
-      .. zuul:attr:: email
+      .. attr:: email
 
          If present, an approval with this email address is required.  It is
          treated as a regular expression.
 
-      .. zuul:attr:: older-than
+      .. attr:: older-than
 
          If present, the approval must be older than this amount of time
          to match.  Provide a time interval as a number with a suffix of
          "w" (weeks), "d" (days), "h" (hours), "m" (minutes), "s"
          (seconds).  Example ``48h`` or ``2d``.
 
-      .. zuul:attr:: newer-than
+      .. attr:: newer-than
 
          If present, the approval must be newer than this amount
          of time to match.  Same format as "older-than".
@@ -235,28 +235,28 @@
       may either be a single value or a list: ``Verified: [1, 2]``
       would match either a +1 or +2 vote.
 
-   .. zuul:attr:: open
+   .. attr:: open
 
       A boolean value (``true`` or ``false``) that indicates whether
       the change must be open or closed in order to be enqueued.
 
-   .. zuul:attr:: current-patchset
+   .. attr:: current-patchset
 
       A boolean value (``true`` or ``false``) that indicates whether the
       change must be the current patchset in order to be enqueued.
 
-   .. zuul:attr:: status
+   .. attr:: status
 
       A string value that corresponds with the status of the change
       reported by the trigger.
 
-.. zuul:attr:: pipeline.reject.<gerrit source>
+.. attr:: pipeline.reject.<gerrit source>
 
    The `reject` attribute is the mirror of the `require` attribute.  It
    also accepts a dictionary under the connection name.  This
    dictionary supports the following attributes:
 
-   .. zuul:attr:: approval
+   .. attr:: approval
 
       This takes a list of approvals. If an approval matches the
       provided criteria the change can not be entered into the
diff --git a/doc/source/admin/drivers/github.rst b/doc/source/admin/drivers/github.rst
index 97492f6..29152ab 100644
--- a/doc/source/admin/drivers/github.rst
+++ b/doc/source/admin/drivers/github.rst
@@ -216,14 +216,14 @@
 named *my-github* must have an approved code review in order to be
 enqueued into the pipeline.
 
-.. zuul:attr:: pipeline.require.<github source>
+.. attr:: pipeline.require.<github source>
 
    The dictionary passed to the GitHub pipeline `require` attribute
    supports the following attributes:
 
    .. _github-pipeline-require-review:
 
-   .. zuul:attr:: review
+   .. attr:: review
 
       This requires that a certain kind of code review be present for
       the pull request (it could be added by the event in question).
@@ -231,46 +231,46 @@
       are combined together so that there must be a code review
       matching all specified requirements.
 
-      .. zuul:attr:: username
+      .. attr:: username
 
          If present, a code review from this username is required.  It
          is treated as a regular expression.
 
-      .. zuul:attr:: email
+      .. attr:: email
 
          If present, a code review with this email address is
          required.  It is treated as a regular expression.
 
-      .. zuul:attr:: older-than
+      .. attr:: older-than
 
          If present, the code review must be older than this amount of
          time to match.  Provide a time interval as a number with a
          suffix of "w" (weeks), "d" (days), "h" (hours), "m"
          (minutes), "s" (seconds).  Example ``48h`` or ``2d``.
 
-      .. zuul:attr:: newer-than
+      .. attr:: newer-than
 
          If present, the code review must be newer than this amount of
          time to match.  Same format as "older-than".
 
-      .. zuul:attr:: type
+      .. attr:: type
 
          If present, the code review must match this type (or types).
 
          .. TODO: what types are valid?
 
-      .. zuul:attr:: permission
+      .. attr:: permission
 
          If present, the author of the code review must have this
          permission (or permissions).  The available values are
          ``read``, ``write``, and ``admin``.
 
-   .. zuul:attr:: open
+   .. attr:: open
 
       A boolean value (``true`` or ``false``) that indicates whether
       the change must be open or closed in order to be enqueued.
 
-   .. zuul:attr:: current-patchset
+   .. attr:: current-patchset
 
       A boolean value (``true`` or ``false``) that indicates whether
       the item must be associated with the latest commit in the pull
@@ -279,24 +279,24 @@
       .. TODO: this could probably be expanded upon -- under what
          circumstances might this happen with github
 
-   .. zuul:attr:: status
+   .. attr:: status
 
       A string value that corresponds with the status of the pull
       request.  The syntax is ``user:status:value``.
 
-   .. zuul:attr:: label
+   .. attr:: label
 
       A string value indicating that the pull request must have the
       indicated label (or labels).
 
 
-.. zuul:attr:: pipeline.reject.<github source>
+.. attr:: pipeline.reject.<github source>
 
    The `reject` attribute is the mirror of the `require` attribute.  It
    also accepts a dictionary under the connection name.  This
    dictionary supports the following attributes:
 
-   .. zuul:attr:: review
+   .. attr:: review
 
       This takes a list of code reviews.  If a code review matches the
       provided criteria the pull request can not be entered into the
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 80cde65..7c0d587 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -34,6 +34,8 @@
 #extensions = ['sphinx.ext.intersphinx']
 #intersphinx_mapping = {'python': ('http://docs.python.org/2.7', None)}
 
+primary_domain = 'zuul'
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 
diff --git a/doc/source/user/config.rst b/doc/source/user/config.rst
index db5500d..7aa1a84 100644
--- a/doc/source/user/config.rst
+++ b/doc/source/user/config.rst
@@ -122,18 +122,18 @@
 
 .. TODO: See TODO for more annotated examples of common pipeline configurations.
 
-.. zuul:attr:: pipeline
+.. attr:: pipeline
 
    The attributes available on a pipeline are as follows (all are
    optional unless otherwise specified):
 
-   .. zuul:attr:: name
+   .. attr:: name
       :required:
 
       This is used later in the project definition to indicate what jobs
       should be run for events in the pipeline.
 
-   .. zuul:attr:: manager
+   .. attr:: manager
       :required:
 
       There are currently two schemes for managing pipelines:
@@ -184,7 +184,7 @@
          For more detail on the theory and operation of Zuul's
          dependent pipeline manager, see: :doc:`gating`.
 
-   .. zuul:attr:: allow-secrets
+   .. attr:: allow-secrets
 
       This is a boolean which can be used to prevent jobs which
       require secrets from running in this pipeline.  Some pipelines
@@ -196,34 +196,34 @@
 
       For more information, see :ref:`secret`.
 
-   .. zuul:attr:: description
+   .. attr:: description
 
       This field may be used to provide a textual description of the
       pipeline.  It may appear in the status page or in documentation.
 
-   .. zuul:attr:: success-message
+   .. attr:: success-message
 
       The introductory text in reports when all the voting jobs are
       successful.  Defaults to "Build successful."
 
-   .. zuul:attr:: failure-message
+   .. attr:: failure-message
 
       The introductory text in reports when at least one voting job
       fails.  Defaults to "Build failed."
 
-   .. zuul:attr:: merge-failure-message
+   .. attr:: merge-failure-message
 
       The introductory text in the message reported when a change
       fails to merge with the current state of the repository.
       Defaults to "Merge failed."
 
-   .. zuul:attr:: footer-message
+   .. attr:: footer-message
 
       Supplies additional information after test results.  Useful for
       adding information about the CI system such as debugging and
       contact details.
 
-   .. zuul:attr:: trigger
+   .. attr:: trigger
 
       At least one trigger source must be supplied for each pipeline.
       Triggers are not exclusive -- matching events may be placed in
@@ -236,7 +236,7 @@
 
    .. _pipeline-require:
 
-   .. zuul:attr:: require
+   .. attr:: require
 
       If this section is present, it establishes pre-requisites for
       any kind of item entering the Pipeline.  Regardless of how the
@@ -251,7 +251,7 @@
 
    .. _pipeline-reject:
 
-   .. zuul:attr:: reject
+   .. attr:: reject
 
       If this section is present, it establishes pre-requisites that
       can block an item from being enqueued. It can be considered a
@@ -261,7 +261,7 @@
       type of the connection will dictate which options are available.
       See :ref:`drivers`.
 
-   .. zuul:attr:: dequeue-on-new-patchset
+   .. attr:: dequeue-on-new-patchset
 
       Normally, if a new patchset is uploaded to a change that is in a
       pipeline, the existing entry in the pipeline will be removed
@@ -269,7 +269,7 @@
       merge as well.  To suppress this behavior (and allow jobs to
       continue running), set this to ``false``.  Default: ``true``.
 
-   .. zuul:attr:: ignore-dependencies
+   .. attr:: ignore-dependencies
 
       In any kind of pipeline (dependent or independent), Zuul will
       attempt to enqueue all dependencies ahead of the current change
@@ -279,7 +279,7 @@
       pipeline, set this to ``true``.  This option is ignored by
       dependent pipelines.  The default is: ``false``.
 
-   .. zuul:attr:: precedence
+   .. attr:: precedence
 
       Indicates how the build scheduler should prioritize jobs for
       different pipelines.  Each pipeline may have one precedence,
@@ -295,7 +295,7 @@
    driver which implements it.  See :ref:`drivers` for more
    information.
 
-   .. zuul:attr:: success
+   .. attr:: success
 
       Describes where Zuul should report to if all the jobs complete
       successfully.  This section is optional; if it is omitted, Zuul
@@ -305,25 +305,25 @@
       connection name. The options available depend on the driver for
       the supplied connection.
 
-   .. zuul:attr:: failure
+   .. attr:: failure
 
       These reporters describe what Zuul should do if at least one job
       fails.
 
-   .. zuul:attr:: merge-failure
+   .. attr:: merge-failure
 
       These reporters describe what Zuul should do if it is unable to
       merge in the patchset. If no merge-failure reporters are listed
       then the ``failure`` reporters will be used to notify of
       unsuccessful merges.
 
-   .. zuul:attr:: start
+   .. attr:: start
 
       These reporters describe what Zuul should do when a change is
       added to the pipeline.  This can be used, for example, to reset
       a previously reported result.
 
-   .. zuul:attr:: disabled
+   .. attr:: disabled
 
       These reporters describe what Zuul should do when a pipeline is
       disabled.  See ``disable-after-consecutive-failures``.
@@ -333,7 +333,7 @@
    due to a problem with an external dependency, or unusually high
    non-deterministic test failures).
 
-   .. zuul:attr:: disable-after-consecutive-failures
+   .. attr:: disable-after-consecutive-failures
 
       If set, a pipeline can enter a ''disabled'' state if too many
       changes in a row fail. When this value is exceeded the pipeline
@@ -342,7 +342,7 @@
       ``disabled`` reporters.  (No ``start`` reports are made when a
       pipeline is disabled).
 
-   .. zuul:attr:: window
+   .. attr:: window
 
       Dependent pipeline managers only. Zuul can rate limit dependent
       pipelines in a manner similar to TCP flow control.  Jobs are
@@ -352,13 +352,13 @@
       be a positive integer value. A value of ``0`` disables rate
       limiting on the DependentPipelineManager.  Default: ``20``.
 
-   .. zuul:attr:: window-floor
+   .. attr:: window-floor
 
       Dependent pipeline managers only. This is the minimum value for
       the window described above. Should be a positive non zero
       integer value.  Default: ``3``.
 
-   .. zuul:attr:: window-increase-type
+   .. attr:: window-increase-type
 
       Dependent pipeline managers only. This value describes how the
       window should grow when changes are successfully merged by
@@ -369,13 +369,13 @@
       previous window value and the result will become the window
       size.  Default: ``linear``.
 
-   .. zuul:attr:: window-increase-factor
+   .. attr:: window-increase-factor
 
       Dependent pipeline managers only. The value to be added or
       multiplied against the previous window value to determine the
       new window after successful change merges.  Default: ``1``.
 
-   .. zuul:attr:: window-decrease-type
+   .. attr:: window-decrease-type
 
       Dependent pipeline managers only. This value describes how the
       window should shrink when changes are not able to be merged by
@@ -386,7 +386,7 @@
       previous window value and the result will become the window
       size.  Default: ``exponential``.
 
-   .. zuul:attr:: window-decrease-factor
+   .. attr:: window-decrease-factor
 
       Dependent pipline managers only. The value to be subtracted or
       divided against the previous window value to determine the new