resolve CHANGE ly_ctx_get_node accepts leaf/leaf-list predicates

TODO the same change for lyd_new_path
diff --git a/src/libyang.h b/src/libyang.h
index bcfa3e3..71a8a72 100644
--- a/src/libyang.h
+++ b/src/libyang.h
@@ -890,6 +890,9 @@
  * If the \p nodeid is relative, \p start is mandatory and is the starting point
  * for the resolution. The first node identifier does not need a module name.
  *
+ * Predicates on lists are accepted (ignored) in the form of "<key>(=<value>)"
+ * and on leaves/leaf-lists ".(=<value>)".
+ *
  * @param[in] ctx Context to work in.
  * @param[in] start Starting node for a relative schema node identifier, in which
  * case it is mandatory.
@@ -910,6 +913,9 @@
  * Since input and output is skipped, there could arise ambiguities if one RPC input
  * contains a parameter with the same name as is in output, hence the flag.
  *
+ * Predicates on lists are accepted (ignored) in the form of "<key>(=<value>)"
+ * and on leaves/leaf-lists ".(=<value>)".
+ *
  * @param[in] ctx Context to work in.
  * @param[in] start Starting node for a relative schema node identifier, in which
  * case it is mandatory.