supybot-wizard: Ask SSL after port and don't say it needs Twisted
supybot-wizard: Use chat. instead of irc.freenode.net
supybot-wizard: Default to port 6697 for SSL
supybot-wizard: Clarify help text from previous commit

[ci skip]
Merge pull request #641 from nyuszika7h/patch/supybot-wizard-fixes

Fixes for supybot-wizard