Improve config check and warning message around encodings

Author: Throne3d

lib/bot.js

@@ -92,11 +92,12 @@ class Bot {
     };
 
     // default encoding to UTF-8 so messages to Discord aren't corrupted
-    if (!('encoding' in ircOptions)) {
+    if (!Object.prototype.hasOwnProperty.call(ircOptions, 'encoding')) {
       if (irc.canConvertEncoding()) {
         ircOptions.encoding = 'utf-8';
       } else {
-        logger.warn('Cannot convert message encoding; you may encounter corrupted characters with non-English text.');
+        logger.warn('Cannot convert message encoding; you may encounter corrupted characters with non-English text.\n' +
+          'For information on how to fix this, please see: https://github.com/Throne3d/node-irc#character-set-detection');
       }
     }