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

1 files changed, 1 insertions, 1 deletions

diff --git a/japanese/kinput2/Makefile b/japanese/kinput2/Makefile
index 2ec396758353..9172f9db6688 100644
--- a/japanese/kinput2/Makefile
+++ b/japanese/kinput2/Makefile
@@ -11,7 +11,7 @@ DISTNAME=	${PORTNAME}-v${PORTVERSION}
 MAINTAINER=	hrs@FreeBSD.org
 COMMENT=	A Japanese text input server for X11 applications
 
-USE_IMAKE=	yes
+USES=		imake
 USE_XORG=	ice sm x11 xaw xext xmu xpm xt
 SUB_FILES=	Kinput2.conf
 PLIST_FILES=	${PLIST_ALL}