K 10
svn:author
V 7
zeising
K 8
svn:date
V 27
2018-09-10T19:56:32.554929Z
K 7
svn:log
V 609
Change USE_GL to become USES=gl.

Change USE_GL to become USES=gl.  You still need to specify USE_GL as well,
to specify which gl components you need, such as egl glesv2 glut glu glw gl.
Only specifying USE_GL is supported for now, to ease in transition.  It is
however deprecated, and will be removed eventually.
Specifying USES=gl without USE_GL is an error.
USE_GL=yes is also deprecated, but supported for now.  It implies USE_GL=glu.

Fix fallout from this change.

PR:		230692
Approved by:	portmgr (antoine)
exp-run by:	antoine
Reviewed by:	mat
Differential Revision:	https://reviews.freebsd.org/D16774

END