just as Xorg upstream did

We do not build loadable modules, so we do not need them anywhere.

Also remove the extra files requires for module builds.

 Fixes ArcticaProject/nx-libs#250.

nx-X11: Enable -Wpedantic as default CFLAG. This is to detect redefined typedefs when building nxagent.

imake clean-up: Enforce build of Mesa GLX extension. Drop all other GLX build methods (built-in DRI drivers, etc.).

imake clean-up: Enforce build of Mesa GLX extension. Drop all other GLX build methods (built-in DRI drivers, etc.).

library clean-up: Don't build and link libXfont.a anymore. Use system's libXfont shared library and link dynamically.

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository