Merge remote-tracking branch 'origin/master' into new_utf8
GTK2: Protect lfuns.
Merge remote-tracking branch 'origin/8.1' into gobject-introspection
Merge branch '8.1' into peter/travis
Use #require instead #if constant
GL.GLSL: Hide GL.GLSL and GL.GLSLUtils when not supported
Add GL.GLSL and GL.GLSLUtil.
This was a project by Per Hedbor that he intended to prepare for
inclusion in Pike and shared as a separate repository on the pike-git
server, albeit yet in the form of an external module. We have now
performed the integration into Pike as a post_module.