Remove exported function create_server_list()

The guts of this function doesn't need to be in server.c - it only uses extern server functions so it
makes sense just to move it into the body of function_servers(), the only caller.

That means it's no longer accessible for loadable modules, but it isn't much use for them anyway.  They
can always directly access the server list if they need that info.

(Requires rolling the module table version).

source/server.c

@@ -2618,32 +2618,6 @@ extern	void BX_close_all_server (void)
 	}
 }
 
-extern	char *BX_create_server_list (char *input)
-{
-	int	i;
-	int	do_read = 0;
-	char *value = NULL;
-
-	if (input && *input == '1')
-		do_read = 1;
-
-	for (i = 0; i < number_of_servers; i++)
-	{
-		if (do_read)
-		{
-			if (is_server_connected(i))
-				m_s3cat(&value, " ", ltoa(i));
-		}
-		else
-		{
-			if (is_server_open(i))
-				m_s3cat(&value, " ", get_server_itsname(i));
-		}
-	}
-
-	return value;
-}
-
 void BX_server_disconnect(int i, char *args)
 {
 char	*message;