net-firewall/shorewall*: v4.5.21.1 added

Changelog
=========
1)  Problems with the Shorewall Init installer (install.sh) were
    corrected. These problems affected initial Gentoo and Debian
    installs.

2)  A problem that prevented multiple ICMP/ICMP6 types to be specified
    in a rule has been corrected.

3)  Previously, an attempt to specify RAS or Q.931 in the HELPER column
    was rejected with an error.

4)  The 'nohostroute' provider option was not honored in the default
    table when USE_DEFAULT_RT=Yes.

Full changelogs: http://www1.shorewall.net/pub/shorewall/4.5/shorewall-4.5.21/releasenotes.txt

Gentoo changes
==============
- shorewall-init installer patch removed, because fixed by upstream

- Support for patch releases added (SRC_URI update)