Convert all USE_FORTRAN=yes to "USES=fortran, USE_GCC=yes". In most cases

USE_GCC=yes has been omitted though.

Remove USE_FORTRAN handling from bsd.port.mk and bsd.gcc.mk.

Minor cleanups in some ports like USE_GMAKE, NOPORTDOCS,...

Exp-run:	bdrewery
Approved by:	portmgr (bdrewery)

graphics/pgplot/Makefile

@@ -15,8 +15,7 @@ LIB_DEPENDS=	png15:${PORTSDIR}/graphics/png
 
 MAKE_JOBS_UNSAFE=	yes
 
-USES=		shebangfix
-USE_FORTRAN=	yes
+USES=		fortran shebangfix
 USE_LDCONFIG=	yes
 USE_XORG=	x11 xproto xt