Fixed wenet.ru's nickserv request.

Wenet.ru uses control characters in the nickserv request. It sends something
like "\x02/NickServ IDENTIFY \x1Fpassword\x1F\x02", so no wonder the
CString:find() was failing.
Merge pull request #376 from nurupo/master

nickserv: wenet.ru's nickserv request fix