supervisor_ctl: rename to server_url and improve documentation

library/web_infrastructure/supervisorctl

@@ -37,7 +37,7 @@ options:
       - configuration file path, passed as -c to supervisorctl
     required: false
     default: null
-  serverurl:
+  server_url:
     description:
       - URL on which supervisord server is listening, passed as -s to supervisorctl
     required: false
@@ -66,8 +66,11 @@ EXAMPLES = '''
 # Manage the state of program to be in 'started' state.
 - supervisorctl: name=my_app state=started
 
-# Restart another_app using an alternate config file
-- supervisorctl: name=another_app state=restart config=/var/opt/my_project/supervisord.conf
+# Restart my_app, reading supervisorctl configuration from a specified file.
+- supervisorctl: name=my_app state=restart config=/var/opt/my_project/supervisord.conf
+
+# Restart my_app, connecting to supervisord with credentials and server URL.
+- supervisorctl: name=my_app state=restart username=test password=testpass server_url=http://localhost:9001
 
 '''
 
@@ -75,7 +78,7 @@ def main():
     arg_spec = dict(
         name=dict(required=True),
         config=dict(required=False),
-        serverurl=dict(required=False),
+        server_url=dict(required=False),
         username=dict(required=False),
         password=dict(required=False),
         state=dict(required=True, choices=['present', 'started', 'restarted', 'stopped'])
@@ -86,15 +89,15 @@ def main():
     name = module.params['name']
     state = module.params['state']
     config = module.params.get('config')
-    serverurl = module.params.get('serverurl')
+    server_url = module.params.get('server_url')
     username = module.params.get('username')
     password = module.params.get('password')
 
     supervisorctl_args = [ module.get_bin_path('supervisorctl', True) ]
-    if config:    supervisorctl_args.extend(['-c', config])
-    if serverurl: supervisorctl_args.extend(['-s', serverurl])
-    if username:  supervisorctl_args.extend(['-u', username])
-    if password:  supervisorctl_args.extend(['-p', password])
+    if config:     supervisorctl_args.extend(['-c', config])
+    if server_url: supervisorctl_args.extend(['-s', server_url])
+    if username:   supervisorctl_args.extend(['-u', username])
+    if password:   supervisorctl_args.extend(['-p', password])
 
     def run_supervisorctl(cmd, name=None, **kwargs):
         args = list(supervisorctl_args)  # copy the master args