0e3eb7ee6c
forked child to be dissociated from the parent). Cleanup fork1(), implement vfork() and fork() in terms of rfork() flags. Remove RFENVG, RFNOTEG, RFCNAMEG, RFCENVG which are Plan9 specific and cannot possibly be implemented in FreeBSD. Renumbered the flags to make up for the removal of the above flags. Reviewed by: peter, smpatel Submitted by: Mike Grupenhoff <kashmir@umiacs.umd.edu>