net-mgmt/zabbix2[24]-server: fix zabbix and database startup sequence

The Zabbix server and proxy ports require a database to run. They
currently support four, PostgreSQL, Oracle, SQLite, and MySQL. As
of now, rcorder puts them ahead of the database ports, so they spit
out dozens of error messages during startup and, worse, get the
database pulled out from under them during shutdown.

The ports used to provide a solution for this, by defining
ZABBIX_REQUIRE. The value of this variable used to be added to the
REQUIRE lines in the startup scripts, but this was removed accidentally
from 2.2 in r355546 and never existed in 2.4. This patch adds it
back, in a slightly different, optionsng-friendly way.

PR:		195081
Submitted by:	chris@chrullrich.net
Approved by:	pakhom706@gmail.com (maintainer)


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375683 35697150-7ecd-e111-bb59-0022644237b5
ports-mgmt/portshaker: Support Subversion 1.7 or 1.8 depending on make.conf

Currently building portshaker package on a clean system will install
subversion 1.8 even if 1.7 is defined in make.conf with
WITH_SUBVERSION_VER=17.

Patch fixes this and will use either 1.7 or 1.8 as required for the
run dependency.

PR:		195740
Submitted by:	simon.wright@gmx.net
Approved by:	romain (maintainer timeout)


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375684 35697150-7ecd-e111-bb59-0022644237b5
graphics/libsixel: update to 1.4.3

PR:		196280
Submitted by:	maintainer (sue@iwmt.org)


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375685 35697150-7ecd-e111-bb59-0022644237b5