server ssh UPDATE authentication with ECDSA keys
ECDSA keys can now be used both as a hostkey and for client
authentication. Three key pairs added for a new test.
diff --git a/tests/data/id_ecdsa521 b/tests/data/id_ecdsa521
new file mode 100644
index 0000000..1c43f0a
--- /dev/null
+++ b/tests/data/id_ecdsa521
@@ -0,0 +1,12 @@
+-----BEGIN OPENSSH PRIVATE KEY-----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+-----END OPENSSH PRIVATE KEY-----