PC-BSD/trueos ec95e4a. Makefile Makefile.inc1, release release-trueos.sh Makefile

Update the way we parse world flags and kernel flags,
lets try and set them much earlier in Makefile, and more
importantly in share/mk/sys.mk so that they get picked up
before the WITH_* -> MK_* parsing takes place.

This fixes #261
DeltaFile
+32-1Makefile
+32-0share/mk/sys.mk
+21-9release/release-trueos.sh
+15-3release/Makefile
+14-2Makefile.inc1
+114-155 files

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