main/[various]: Bump pkgrel for .pre-install scripts fixes.

* main/dovecot: Properly set primary group in .pre-install.
main/dovecot/dovecot.pre-install

* main/{npre,postgrey}: Properly set primary group in .pre-install.
main/nrpe/nrpe.pre-install
main/postgrey/postgrey.pre-install

* main/ympd: Reorder arguments in .pre-install as in da4e96aa.
main/ympd/ympd.pre-install

* main/znc: Reorder arguments in .pre-install as in da4e96aa.
main/znc/znc.pre-install

* main/aports-build: Reorder arguments in .pre-install as in da4e96aa.
main/aports-build/aports-build.pre-install

* main/atheme-iris: Fix overlooked consistency issue as in a60b9f07.
main/atheme-iris/atheme-iris.pre-install

* main/[various]: Add group and use it as primary in .pre-* scripts.
main/apache2/apache2.pre-install
main/aports-build/aports-build.pre-install
main/atheme-iris/atheme-iris.pre-install
main/clamav/clamav-db.pre-install
main/clamsmtp/clamsmtp.pre-install
main/clamsmtp/clamsmtp.pre-upgrade
main/coova-chilli/coova-chilli.pre-install
main/dhcp/dhcp.pre-install
main/djbdns/dnscache.pre-install
main/djbdns/tinydns.pre-install
main/ez-ipupdate/ez-ipupdate.pre-install
main/fetchmail/fetchmail.pre-install
main/freeswitch/freeswitch.pre-install
main/gitolite/gitolite.pre-install
main/gnats/gnats.pre-install
main/gross/gross.pre-install
main/icecast/icecast.pre-install
main/memcached/memcached.pre-install
main/ngircd/ngircd.pre-install
main/openntpd/openntpd.pre-install
main/snort/snort.pre-install
main/squid/squid.pre-install
main/squid/squid.pre-upgrade
main/transmission/transmission-daemon.pre-install
main/znc/znc.pre-install