Update USE_GITHUB so it does not require GH_COMMIT.

Using this new scheme allows only setting the _tag_ or _commit hash_ in
GH_TAGNAME and not having to know the hash for a tag.  This scheme will
download a tarball that has a different checksum than before due to a changed
directory name for extraction.

The following MASTER_SITES are provided to retain the old checksum and
directory structure (that require GH_COMMIT):
  GH -> GHL
  GITHUB -> GITHUB_LEGACY

Differential Revision:	https://reviews.freebsd.org/D748
Submitted by:	amdmi3
Reviewed by:	mat, swills, antoine, bdrewery
With hat:	portmgr

Berkeley DB cleanup, remove versions 4.0 ... 4.7.
- Mk/bsd.database.mk rewrite, new default to db5.
- db6 is eligible by default only if installed on the system.
- Bump PORTREVISION of all ports that directly depend on BerkeleyDB or
  where USE_BDB is found in the port's directory
- Patch a few ports such that they will pick up or work with newer
  versions.
- Add UPDATING entry
- Drive-by format fix for pks
- Drop BerkeleyDB option from mail/popular for now, requires more work.
- Exp-run logs linked from the PR below.
- Ports that do not build (IGNORE, BROKEN, etc.) have pro-forma changes
  for new Berkeley DB, but are untested.

NOTE: please read UPDATING and the Wiki page before proceeding!

Announcement:	http://lists.freebsd.org/pipermail/freebsd-ports-announce/2014-August/000090.html
Wiki reference:	https://wiki.freebsd.org/Ports/BerkeleyDBCleanup
PR:		192690
Approved by:	portmgr (implicit, PORTREVISION bump on unstaged ports)

Convert GMAKE to MAKE_CMD
Please note that lots of invocation of MAKE_CMD here are wrong as they do not
properly respect MAKE_ENV and friends

With hat:	portmgr

- Update to 0.8.6.2
- Improve USE_QT4
- Fix build after boost update

net-p2p/litecoin: Fix DragonFly (broken by OSVERSION)

Limit OSVERSION-based modifications to FreeBSD.  This port suddenly
broken and the use of OSVERSION without OPSYS was the cause.

Chase boost and icu bump
While here convert some LIB_DEPENDS

- Use more correct OSVERSION check [1]
- Remove WITHOUT_X11 and use standard X11 option

PR:		ports/186137 [1]
Reported by:	Waitman Gobble <uzimac@da3m0n8t3r.com> [1]

- Support stage dir
- Install icon and desktop file

- Update to 0.8.6.1

Convert LIB_DEPENDS for ports depending on boost

- Pass QMAKE_ARGS to qmake

Approved by:	portmgr (blanket approval)

- Update to 0.8.5.1
- Fix build on 10.0-ALPHA2

Add NO_STAGE all over the place in preparation for the staging support (cat:
net-p2p)

- Fix build when GUI is disabled

Reported by:	"Sam Fourman Jr." <sfourman@gmail.com>
Obtained
from:	https://github.com/bitcoin/bitcoin/issues/2521#issuecomment-17364844

- Update to 0.8.3.7

- Fix patch mistake, prevent 100% CPU usage

- Update to 0.6.9.2

- Add local mirror to avoid GitHub issues

- Oops, somehow the commit ID changed too.

- Update distinfo due to github, if it happens again, I'll make a local dist
file

Litecoin is a peer-to-peer Internet currency that enables instant payments to
anyone in the world. It is based on the Bitcoin protocol but differs from
Bitcoin in that it can be efficiently mined with consumer-grade hardware.
Litecoin provides faster transaction confirmations (2.5 minutes on average) and
uses memory-hard, scrypt-based mining proof-of-work algorithm to target the
regular computers and GPUs most people already have. The Litecoin network is
scheduled to produce 84 million currency units.

One of the aims of Litecoin was to provide a mining algorithm that could run at
the same time, on the same hardware used to mine bitcoins. With the rise of
specialized ASICs for Bitcoin, Litecoin continues to satisfy these goals. It is
unlikely for ASIC mining to be developed for Litecoin until the currency is
widely used.

WWW: http://www.litecoin.org/