Log Message:
Enable more functionality in modular-xorg-server:

- always include dri3 support with dri option (can still use dri2)
- always include GLAMOR support with dri option
- enable xtrans file descriptor passing
- require mesa 11
- Bump PKGREVISION

GLAMOR is experimental OpenGL accelerated 2D graphics. It works with
xf86-video-ati and xf86-video-intel but must be explicitly enabled.
Sample configuration:

---8<---
# /usr/pkg/share/X11/xorg.conf.d/20-glamor.conf
Section "Module"
    Load "dri2"
    Load "glamoregl"
EndSection
Section "Device"
    Identifier "radeon" # or intel
    Driver "radeon" # or intel
    Option "AccelMethod" "glamor"
EndSection
---8<---