Whitelist reason cvar + RP server whitelist reason (#10451)

Content.Server/Connection/ConnectionManager.cs

@@ -131,7 +131,7 @@ The ban reason is: ""{ban.Reason}""
                 && await _db.GetWhitelistStatusAsync(userId) == false
                 && adminData is null)
             {
-                return (ConnectionDenyReason.Whitelist, Loc.GetString("whitelist-not-whitelisted"), null);
+                return (ConnectionDenyReason.Whitelist, Loc.GetString(_cfg.GetCVar(CCVars.WhitelistReason)), null);
             }
 
             return null;

Content.Shared/CCVar/CCVars.cs

@@ -813,6 +813,12 @@ namespace Content.Shared.CCVar
         public static readonly CVarDef<bool> WhitelistEnabled =
             CVarDef.Create("whitelist.enabled", false, CVar.SERVERONLY);
 
+        /// <summary>
+        ///     The loc string to display as a disconnect reason when someone is not whitelisted.
+        /// </summary>
+        public static readonly CVarDef<string> WhitelistReason =
+            CVarDef.Create("whitelist.reason", "whitelist-not-whitelisted", CVar.SERVERONLY);
+
         /*
          * VOTE
          */

Resources/Locale/en-US/connection-messages.ftl

@@ -1,4 +1,5 @@
 whitelist-not-whitelisted = You are not whitelisted.
+whitelist-not-whitelisted-rp = You are not whitelisted. To become whitelisted, visit our Discord (which can be found at https://spacestation14.io) and check the #rp-whitelist channel.
 
 command-whitelistadd-description = Adds the player with the given username to the server whitelist.
 command-whitelistadd-help = whitelistadd <username>