Remove WWW entries moved into port Makefiles

Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.

This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.

Approved by:		portmgr (tcberner)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

One more small cleanup, forgotten yesterday.
Reported by:	lwhsu

Remove # $FreeBSD$ from Makefiles.

Update a few GNUstep ports:

 * devel/gnustep-make: Update to 2.8.0
 * lang/gnustep-base: Update to 1.27.0
 * x11-toolkits/gnustep-back: update to 0.28.0
 * x11-toolkits/gnustep-gui: update to 0.28.0

Also bump PORTREVISION on dependent ports.

deskutils/preferences: Drop nop and misspelled DEAFULT_LIBVERSION

Move Objective-C ports to the v2 GNUstep ABI.

 * Bump the LLVM revision used for GNUstep to 7, the minimum to support
   the new ABI.
 * GNUstep-back does not work with lld, so mark it to use Gold (BFD LD
   doesn't seem able to link Objective-C things).
 * Turn off some annoying debug logs in GNUstep back, which generate
   several messages per second when you move the mouse.  These should
   never have been enabled in a release build anyway.
 * Downgrade Cenon to 4.0.2.  This was the last version to actually work
   with GNUstep (the later ones use XCode >= 5 .xib files, which GNUstep
   can't parse).
 * Update gorm to git head. The current release doesn't work with the
   new Objective-C ABI, but -head has the patches to fix it.
 * Update PikoPixel and add it to the gnustep-app meta-package.
 * Update the three core GNUstep packages to the latest release.
 * Update gnumail and pantomime to the latest release and fix a linking
   error with the new ABI.
 * Update GNUstep FTP to the latest version.

Reviewed by:	bapt (previous version)

Update Objective-C LLVM version to 6.0.

Fixes aarch64 build.  Reduces depends on obsolete LLVM 4.0.

PR:		230116
Submitted by:	mikael.urankar@gmail.com
Approved by:	theraven (prior version)
Sponsored by:	DARPA, AFRL

Fix configure options for gnustep-make

We were not setting the flag to select the GNUstep ABI, so were defaulting to
using the GCC-compatible version, which was likely to trigger a lot of subtle
bugs.  This was noticed when C++ exceptions thrown through Objective-C stack
frames caused segfaults.

Update GNUstep core libraries.

Update the default Objective-C compiler.

Fix various build failures in GNUstep ports from newer versions of the GNUstep
core libraries and from changes to GNUstep Make.

Update various ports that use GNUstep and bump the portrevision of the ones
that haven't had a new release.

Make all GNUstep ports install into the System domain so that the Local domain
is available for stuff built from source.

Some ports were already installing in the System domain, for these just remove
the Makefile lines explicitly specifying the install domain.

The rest are installed in the Local domain, remove any overrides, update their
pkg-plists and any explicit paths in the Makefiles and then bump port revision.

Approved by:	bapt (mentor)
Differential Revision:	https://reviews.freebsd.org/D2977

- Strip binaries

Convert bsd.gnustep.mk to USES=gnustep

Simplify gnustep ports
Hook into the regular ports framework:
- LIB_DEPENDS for library dependencies
- Use regular USE_LDCONFIG

Reuse USES=objc (automatic)
USE_GNUSTEP is now a macro to set the dependencies and build feature needed.
Accepted arguments: back base build gui

Merge deskutils/preferencepanes into deskutils/systempreferences

Cleanup plist

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)

Allow staging as a regular user

Bump PORTREVISION on more ports that depend on libgcrypt after the update
in r363436 and remove the UPDATING entry because it did not guarantee
that all ports were updated nor that they were updated in the right order.
Also remove libgcrypt.la again.

PR:		192342
Approved by:	portmgr (implicit, bump unstaged ports)

Convert some more USE_BZIP2 to USES=tar:bzip2

Approved by:	portmgr (not really, but touches unstaged ports)

Stagify.

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

- don't remove directory not created by the port.
A 
Reported by:	pkg (DEVELOPER_MODE)

- cleanup comments
Feature safe: yes

- drop .app suffix in portname of preferences