Remove # $FreeBSD$ from Makefiles.

Add USES=xorg USES=gl, ports categories x

Add USES=xorg and USES=gl to ports in categories starting with 'x'
While here, try to sprinkle other USES (mostly gnome and sdl) as needed.

x11*/*: Use NO_WRKSUBDIR

Move some things as suggested by the PHB.

Remove indefinite articles and trailing periods from COMMENT, plus
minor COMMENT typos and surrounding whitespace fixes. A few Makefiles
where not included as they contain Latin-1 characters that break
the Phabricator workflow. Category X.

CR:		D511
Approved by:	portmgr (bapt)

Support stagedir.

Approved by:	portmgr (blanket infrastructure)

Add NO_STAGE all over the place in preparation for the staging support (cat:
x11)

New USES imake to handle the dependency on imake.

This uses accept 'env' as an argument for ports that do use their own or a
different do-configure target.

Modify xmkmf so it accept IMAKECPPFLAGS as default flags for imake and pass it
to the called imake.
Modify xorg-cf-files (the FreeBSD.cf configuration file) to allow CppCmd to be
overwritten.
Pass CppCmd CcCmd and CplusplusCmd via command line to each call of imake via
IMAKECPPFLAGS
Pass IMAKE_DEFINE with the above arguments to MAKE_ARGS so that imake spawned
from Makefile generated by a previous
imake also inherit the defined CppCmd CcCmd and CplusplusCmd.
Make imake use devel/tradcpp all the time, so that when buidling with clang we
do not depend on gcc's cpp.
Make imake respect CC and CXX
Make imake respect USE_GCC (if set imake will use gcc's cpp).

While here:
- Remove a couple of indefinite articles from comments
- Trim headers
- Fix a couple of ports to build with clang or use: USE_GCC=any
- Fix a now useless redefinition of the extraction chain
- Fix a typo in japanese/Wnn7-lib bundled imake template definitions
- Fix some XMKMF execution with no env specified
- Use options helper in x11/xautolock to simplify the port

Fix typos in COMMENT

Approved by:	portmgr@ (implicit)

Add build dependencies.

Discovered by:  pointyhat

Update package comment.

Welcome xascii to ports. Xascii has been around for a long time. It displays
the complete ascii character set along with each character's value in either
decimal, hexidecimal, or octal notation.