devel/json-c: Upgrade version 0.11 => 0.12, add MIT license

PR:		190351
Submitted by:	Eoro Hanninen
Alternate by:	Muhammad Rahman
Tweaked by:	marino
devel/json-c: Reset maintainer

There have been multiple PR timeouts, the maintainer was last seen in
2009.  I should have reset this with the recent (troublesome) upgrade to
version 0.l2
- Update USE_GITHUB usage
- Use CONFLICTS_INSTALL instead of CONFLICTS
- Bump PORTREVISION for tarball size/hash change (no content change)
- Cosmetic change
- Take maintainership
- Cleanup Makefile
- Remove -Werror

PR:		ports/193632
Submitted by:	marino
Fix build after json-c update.

rsyslog8-devel fails to build against the new json-c, so I've marked it
BROKEN.
- Update sysutils/rsyslog7 to 7.6.6 [1] and sysutils/rsyslog8 to 8.4.1 [2] to fix CVE-2014-3634 [3].

1: http://www.rsyslog.com/changelog-for-7-6-6-v7-stable/
2: http://www.rsyslog.com/changelog-for-8-4-1-v8-stable/
3: http://www.rsyslog.com/remote-syslog-pri-vulnerability/

Reviewed by:	bdrewery@
Security:	8e0e86ff-48b5-11e4-ab80-000c29f6ae42

Conflicts:
	sysutils/rsyslog7/Makefile
	sysutils/rsyslog8/Makefile
- Update sysutils/rsyslog7 to 7.6.7 [1] and sysutils/rsyslog8 to 8.4.2 [2] to fix CVE-2014-3634 [3].

1: http://www.rsyslog.com/changelog-for-7-6-7-v7-stable/
2: http://www.rsyslog.com/changelog-for-8-4-2-v8-stable/
3: http://www.rsyslog.com/remote-syslog-pri-vulnerability/

Reviewed by:	bdrewery
Security:	8e0e86ff-48b5-11e4-ab80-000c29f6ae42

Conflicts:
	sysutils/rsyslog8/Makefile
	sysutils/rsyslog8/distinfo
Add missed PORTVERSION bump from r369854
Fix build