Handle error 415

This is returned in channels set +R (solanum) or +M (oftc-hybrid), which
doesn't let unidentified users to talk.

Signed-off-by: Ferass El Hafidi <vitali64pmemail@protonmail.com>

Author: Ferass El Hafidi

src/codes.ts

@@ -397,6 +397,13 @@ export const replyCodes = {
         name: 'err_wildtoplevel',
         type: 'error'
     },
+    // Used in oftc-hybrid-1.7.3 and Solanum.
+    // Returned when a channel requires its users to have a NickServ account to 
+    // talk.
+    415: {
+        name: 'err_needreggednick',
+        type: 'error'
+    },
     421: {
         name: 'err_unknowncommand',
         type: 'error'