This update to irssi 1.0.2 fixes security issues and bugs.

The following vulnerabilities were fixed:

boo#1029020: Use after free while producing list of netjoins

The following non-security changes are included:

- Fix in command arg parser to detect missing arguments in tail place
- Fix regression that broke incoming DCC file transfers
- Fix issue with escaping \ in evaluated strings
- improve UTF8 support in GRegex