Log Message:
Import security fixes for libosip2

This adds patches for the following CVE entries:
- CVE-2016-10324
- CVE-2016-10325
- CVE-2016-10326
- CVE-2017-7853

All patches were obtained from Debian and verified to match upstream.

While there, rename and comment the previous patch.

Bumps PKGREVISION.

XXX pull-up