gnome: remove some unused gnomesharp components

lang/mono: switch to 5.20 by default

PR:		238089

lang/mono: respect MONO_DEFAULT in consumers

PR:		251795

*/*: return mono@ ports to the pool

The team previously known as mono has no active members.

I will send an email to ports@ in case anyone wants to pick up these
ports.
Approved by:	portmgr (bofh)

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.

lang/mono: update to version 5.2.0.215 (and enhance USES=mono)

Highlights:
 - New Roslyn compiler for C# available
 - Improved support for nuget packages in USES=mono

General:
 - fix pkg-plist: mono now produces '.pdb' debug files instead of '.mdb'
 - bump all dependant ports

USES=mono:
 - properly handle caching of nuget packages
 - add support for multiple feeds for nuget packages
 - add support for nuget dependencies in a separate file
 - add support for paket packages

Use USES=pathfix where applicable.

PR:		213195
Submitted by:	mat
Exp-run by:	antoine
Sponsored by:	Absolight
Differential Revision:	https://reviews.freebsd.org/D8093

Convert tab after WWW: in pkg-descrs to single space as per PHB

Approved by:	portmgr blanket

Fix configure with mono 4

Reported by:	pkg-fallout

Convert to USES=mono pathfix (and unbreak when no TZ is set)

Reported by:	pkg-fallout

Cleanup plist

- Stage support
- Convert gmake to USES

Fix properties on pkg-plist

Add NO_STAGE all over the place in preparation for the staging support (cat:
devel part 3)

Convert devel to USES=pkgconfig

* Update the glib to 2.34.3 and gtk20 to 2.24.17 and gtk30 to 3.6.4 which
  are the latest stable releases.
* Update vala to the newest stable release 0.18.1, also update a few ports
  in the gtk/gnome stack.
* The c++ bindings ports for glib, atk, gconf, etc, have now USE_GNOME toggles.
* Remove pkg-config run depends from glib20 and freetype2. This doesn't
  eliminate pkg-config run dependency completely, a second phase is needed
  and is planned.
* Support for .:run. and .:build. for USE_GNOME components was added.
  Currently only libxml2 and libxslt support this mechanism.
* Updates of the telepathy stack and empathy.
* Trim makefile headers, convert ports to new options, trim off library
  versions for some ports.
* Fix other ports so they build with the new glib version.

Thanks to miwi and crees for helping out with some exp-runs.
Approved by:	portmgr (miwi & bapt)
Obtained from:	gnome team repo

NDesk.Options is a callback-based program option parser for C#.

WWW:	http://www.ndesk.org/Options