Add SkipVersionCheck option

Settings.md

@@ -71,6 +71,7 @@
     - [NoTLS](#notls)
     - [Password *](#password--1)
     - [Server *](#server--3)
+    - [SkipVersionCheck](#skipversioncheck)
     - [Team *](#team-)
     - [Token](#token-1)
     - [Webhook options](#webhook-options)
@@ -780,6 +781,17 @@ Example:
 
 `Server="yourmattermostserver.domain"`
 
+## SkipVersionCheck
+Skip the Mattermost server version checks that are normally done when connecting.
+The usage scenario for this feature would be when the Mattermost instance is hosted behind a 
+reverse proxy that suppresses "non-standard" response headers in flight.
+
+Setting: OPTIONAL \
+Format: boolean \
+Example: enable it
+
+`SkipVersionCheck=true`
+
 ## Team *
 Your team on mattermost.