Fix incorrect variable name usage

rowbot

@@ -479,7 +479,7 @@ on_msg_005_welcome() {
   declare -gA isupport
   local param key value
 
-  for param in "${args[@]:1:${#args[@]}-2}"; do
+  for param in "${msg_args[@]:1:${#msg_args[@]}-2}"; do
     # This is a valid assignment, not a comparison.
     # shellcheck disable=SC1097
     IFS== read -r key value <<< "$param"