*/*: take ownership of lev@'s Subversion ports

As agreed with lev@, I am taking ownership of these ports.

Approved by:	jrm (mentor), lev
Differential Revision:	https://reviews.freebsd.org/D44862

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.

Make this port actually do something after r479428.

Do not abuse INSTALL_MAN when installing documentation, examples, and
other miscellaneous files which are not actually manual pages.

Remove the empty do-fetch target, and use a more sensible way of
fetching the DISTFILES.

Approved by:	portmgr blanket
Sponsored by:	Absolight

MASTER_SITES cleanup.

- Replace ${MASTER_SITE_FOO} with FOO.
- Merge MASTER_SITE_SUBDIR into MASTER_SITES when possible. (This means 99.9%
  of the time.)
- Remove occurrences of MASTER_SITE_LOCAL when no subdirectory was present and
  no hint of what it should be was present.
- Fix some logic.
- And generally, make things more simple and easy to understand.

While there, add magic values to the FESTIVAL, GENTOO, GIMP, GNUPG, QT and
SAMBA macros.

Also, replace some EXTRACT_SUFX occurences with USES=tar:*.

Checked by:	make fetch-urlall-list
With hat:	portmgr
Sponsored by:	Absolight

Cleanup plist

Convert some more USE_BZIP2 to USES=tar:bzip2

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

Unbreak this port.

Noted by:	ohauer

Add DOCS to OPTIONS_DEFINE to ports that check for PORT_OPTIONS:MDOCS.

- move subversion documentation into own port

Approved by:	lev@