Remove expired webkit-gtk2 and webkit-gtk3 ports.

Bump graphics/variety deprecation date, there is a patch for a update which
uses webkit2-gtk3 in ports/236180 but I had issues that I could't fix.

Mark webkit-gtk[23] ports as depricated with the same date as webkit-gtk[23].
Disable webkit-gtk[23] support if the port/plugin supports it.

Remove options for webkit-gtk[23] using ports or if they don't have a
option, mark them deprecated with the same date as webkit-gtk[23].

Haskell and geany where skipped and will be handled by the maintainers.

Update net/libproxy to 0.4.15

* this release switched the build system to cmake
* move libproxy-gnome to libproxy-gnome2 for consistency
* add new slave libproxy-webkit3
* try to simplify the whole thing

* bump revisions in the dependencies

Reviewed by:	gnome (kwm), mat
Differential Revision:	https://reviews.freebsd.org/D15655

Remove ${PORTSDIR}/ from dependencies, categories m, n, o, and p.

With hat:	portmgr
Sponsored by:	Absolight

Update libproxy and its slave ports to 0.4.12.

After being dormant since 2013, libproxy development picked up some steam at
the end of last year, and the project moved from Google Code to GitHub,
where its releases are also being hosted. A summary of changes between 0.4.6
and 0.4.12 can be found here:
    https://github.com/libproxy/libproxy/blob/0.4.12/NEWS

The libproxy ports themselves have undergone several changes too:
* net/libproxy
  - Drop a lot of patches that are no longer necessary.
  - Add a few patches that I have sent upstream, and add some context to the
    0.4.6 patches that are still required.
  - Explicitly disable a few build options (.NET bindings, for example).
  - Switch to an out-of-source CMake build (also applies to the slave

Add upstream patch to fix CVE-2012-4504.

Approved by:	gnome (kwm)
Security:	3b5c2362-bd07-11e5-b7ef-5453ed2e2b49
Security:	CVE-2012-4504

Update libproxy's website in the slave ports too.

Approved by:	gnome (kwm)

Update the default version of GCC in the Ports Collection from GCC 4.7.4
to GCC 4.8.3.

Part II, Bump PORTREVISIONs.

PR:		192025
Tested by:	antoine (-exp runs)
Approved by:	portmgr (implicit)

Support stage

net/libproxy-webkit: USES+= pkgconfig

Approved by:	portmgr (bapt, implicit)

Add NO_STAGE all over the place in preparation for the staging support (cat:
net)

Fix typos in COMMENT

Approved by:	portmgr@ (implicit)

- update png to 1.5.10

Update to 0.4.6.

- update to 1.4.1
Reviewed by:    exp8 run on pointyhat
Supported by:   miwi

- update to jpeg-8

Presenting GNOME 2.28.1 for FreeBSD.  The official release notes for this
release can be found at http://library.gnome.org/misc/release-notes/2.28/ .
Officially, this is mostly a polishing release in preparation for GNOME 3.0
due in about a year.

On the FreeBSD front, though, a lot went into this release.  Major thanks
goes to kwm and avl who did a lot of the porting work for this release.
In particular, kwm brought in Evolution MAPI support for better Microsoft
Exchange integration.  Avl made sure that the new gobject introspection
repository ports were nicely compartmentalized so that large dependencies
aren't brought in wholesale.

But, every GNOME team member (ahze, avl, bland, kwm, mezz, and myself)
contributed to this release.

- bump all port that indirectly depends on libjpeg and have not yet been bumped
or updated
Requested by:   edwin

Add libproxy-webkit, a plug-in which allows WebKit-based web browsers to
make use of libproxy.