nickserv: wenet.ru's nickserv request fix

The nickserv module doesn't call IDENTIFY on wenet network.

Wenet.ru uses control characters in the nickserv request. It sends something like `\x02/NickServ IDENTIFY \x1Fpassword\x1F\x02`, but the module was looking for exactly that but without control characters `type /NickServ IDENTIFY password`.

Stripping control characters helps.