icq through stunnel: enable certificate verification.

Suggested earlier (see This icq..) config for running icq
(pidgin) through stunnel is insecure! Though it provides encryption, it does
not verify certificates, because stunnel's default is 'verify=0'.

So, here is how to fix it, but for debian wheezy.

This icq..

Upd5. 2012-11-16. Suggested here stunnel config is insecure. See icq through stunnel: enable certificate verification for improvement.

This icq, this damned icq.. doesn't log in! As i expected, though.