Add more specific entry handlers to xorg.conf
Add more specific entry handlers to xorg.conf

Additionally handle:
* Driver
* Identifier
* VideoRam
* DefaultDepth

This covers all entries in the default configuration.

The advantage of having a specific handler is that it knows more about what
values are valid. For example, with this patch Driver will not accept an
unquoted value, which would cause the X server not to start.

dafugg/augeas,kunkku/augeas,raphink/augeas,jasperla/augeas,bkearney/augeas,lutter/augeas,mchf/augeas,domcleal/augeas,pevalme/augeas,pevalme/augeas,jtopjian/augeas,mlichvar/augeas,kunkku/augeas,ptoscano/augeas,domcleal/augeas,hercules-team/augeas,pevalme/augeas,manandbytes/augeas,jasperla/augeas,raphink/augeas,domcleal/augeas,kumy/augeas,kunkku/augeas,hercules-team/augeas-do-not-use,MikaelSmith/augeas,jtopjian/augeas,manandbytes/augeas,bkearney/augeas,jjlin/augeas,ptoscano/augeas,mchf/augeas,lutter/augeas,GeoffWilliams/augeas,kumy/augeas,dafugg/augeas,hercules-team/augeas-do-not-use,lutter/augeas,kumy/augeas,jjlin/augeas,ptoscano/augeas,mlichvar/augeas,mlichvar/augeas,dafugg/augeas,bkearney/augeas,hercules-team/augeas-do-not-use,bkearney/augeas,GeoffWilliams/augeas,hercules-team/augeas,kumy/augeas,MikaelSmith/augeas,jjlin/augeas