modular xorg.
- supply corresponding USE_XORG for all imake-using ports that need it
- USE_IMAKE no longer implies USE_XLIB in absence of USE_XORG
- retire USE_X_PREFIX which is not really used anywhere after the
above change
- a few minor nits like whitespace and SF macro
Tested by: 2 tinderbox runs by pav
Approved by: portmgr (pav)
- Remove USE_XLIB/USE_X_PREFIX/USE_XPM in favor of USE_XORG
- Remove X11BASE support in favor of LOCALBASE or PREFIX
- Use USE_LDCONFIG instead of INSTALLS_SHLIB
- Remove unneeded USE_GCC 3.4+
Thanks to all Helpers:
Dmitry Marakasov, Chess Griffin, beech@, dinoex, rafan, gahr,
ehaupt, nox, itetcu, flz, pav
PR: 116263
Tested on: pointyhat
Approved by: portmgr (pav)
