new argument passing conventions. minor type size cleanup.

return types, 64-bit changes: ioctl cmd -> u_long, casts, etc.

emulate the other common case of setreuid (setregid):
setting both effective and real to the same value

copyright typo

add USL's copyright notice

minor simplification of cfree, from Jan-Simon Pendry <jsp@sequent.com>

lint

changes for 4.4BSD-Lite requested by USL

4.4BSD snapshot (revision 8.1); add 1993 to copyright

enterpgrp now returns a value

new include syntax

transfer proc ownership when doing setuid()

put back a semblance of setreuid and setregid compatibility

update to use uid_t and gid_t

ANSIfy syscall args

delete osetreuid as it is simulated in libc/compat-43;
delete osetregid as it is unneeded.

set SUGID when user/group when permissions change (to avoid
unscrupulous attaches)

merge in COMPAT_SUNOS

in setpgid, check target's pid against pgrp, not ours; don't need "targ" on
everything

fix tests in setpgid()

more-or-less working with new proc & user structs

fix old comment

bug: setgroups never called crcopy(); other stuff, change crcopy to
not copy if cr_ref == 1, exec code doesn't check; make the comments prettier

copyinstr/copyoutstr now return ENAMETOOLONG when name is too long

cleaned-up cleanups: make getgroups look like setgroups