PrivSep Issues:
- mmap() issues.
- + No/broken MAP_ANON
- + broken /dev/zero parse
+ + /dev/zero solution (Solaris)
+ + No/broken MAP_ANON (Irix)
+ + broken /dev/zero parse (Linux)
- PAM
+ See above PAM notes
- AIX
- + Issues with usrinfo()
+ + usrinfo() does not set TTY, but only required for legicy systems. Works
+ with PrivSep.
- OSF
+ SIA is broken
- Cygwin