add tls support for irssi, from patch by <sum> (Clemens Helfmeier),
except that, in his patch,
- dependencies for non-tls were wrong
- ipkg control file syntax was wrong
- it didn't even apply
also, the usual whitespace and quoting cleanup, where I saw it
git-svn-id: svn://www.freewrt.org/trunk/freewrt@2170 afb5a338-a214-0410-bd46-81f09a774fd1