Remove # $FreeBSD$ from Makefiles.

devel/cld2: Fix build with Clang 6

cld_generated_cjk_uni_prop_80.cc:169:1: error: constant expression evaluates to
-14 which cannot be narrowed to type 'CLD2::uint8' (aka 'unsigned char')
[-Wc++11-narrowing]
-14,-14,-14,-14,-14,-14,-14,-14, -14,-14,-14,-14,-14,-14,-14,-14,
^~~
cld_generated_cjk_uni_prop_80.cc:169:1: note: insert an explicit cast to silence
this issue
-14,-14,-14,-14,-14,-14,-14,-14, -14,-14,-14,-14,-14,-14,-14,-14,
^~~
static_cast<uint8>( )

http://beefy11.nyi.freebsd.org/data/head-i386-default/p477696_s338122/logs/errors/cld2-20150505.log

PR:		230906
Submitted by:	tobik
Approved by:	demon (maintainer)

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

Rename cld --> cld2 (since it corresponds to version 2 of CLD).