fix one spelling mistake and two help messages

I checked all the 70 rst files in doc/source/command-objects and
found that:
 -one spelling mistake as:rescure should be rescue(server.rst)
 -two help messages:xpvnc should be xvpvnc(console-url.rst and
  console.py)

Change-Id: I6f46c79983eaf5650bd3aa0ab448c19f5c6527a9

1 files changed, 1 insertions, 1 deletions

diff --git a/openstackclient/compute/v2/console.py b/openstackclient/compute/v2/console.py
index 4179fa5c..74bed441 100644
--- a/openstackclient/compute/v2/console.py
+++ b/openstackclient/compute/v2/console.py
@@ -87,7 +87,7 @@ class ShowConsoleURL(command.ShowOne):
             dest='url_type',
             action='store_const',
             const='xvpvnc',
-            help=_("Show xpvnc console URL")
+            help=_("Show xvpvnc console URL")
         )
         type_group.add_argument(
             '--spice',