Log Message:
irssi: update to 1.0.4. security fix.

v1.0.4 2017-07-07  The Irssi team <staff@irssi.org>
	- Fix null pointer dereference when parsing invalid timestamp (GL#10,
	  GL!15). Reported by Brian 'geeknik' Carpenter.
	- Fix use-after-free condition when removing nicks from the internal
	  nicklist (GL#11, GL!16). Reported by Brian 'geeknik' Carpenter.
	- Fix incorrect string comparison in DCC file names (#714).
	- Fix regression in Irssi 1.0.3 where it would claim "Invalid time '-1'"
	  (#716, #722).
	- Fix a bug when using \n to separate lines with expand_escapes (#723).
	- Retain screen output on improper exit, to better see any error
	  messages (#287, #721).
	- Minor help update (#729).