Add some more words to the wordlist.

Change-Id: I48007b6422fc30847baa2e73e25781fcdd647936
Reviewed-on: http://gerrit.dmdirc.com/3745
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

.idea/wordlists/dmdirc.txt

@@ -4,3 +4,6 @@ ctcp
 completers
 plugin's
 ident
+substitutor
+unregister
+migrator