irssi: bump version to version 1.0.2

irssi: bump version to version 1.0.2

Notice that this fixes a security issue:

CWE-416 (use after free condition during netjoin processing). No CVE
assigned yet:

https://irssi.org/security/irssi_sa_2017_03.txt

But the 0.8.x series is not believed to be vulnerable to this specific
issue.  From the advisory:

Affected versions
-----------------

Irssi up to and including 1.0.1

We believe Irssi 0.8.21 and prior are not affected since a different
code path causes the netjoins to be flushed prior to reaching the use
after free condition.

Openssl is no longer optional, so select it and drop the enable/disable
handling.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>