MFC 225908, 225912, 225927:

MFC 225908, 225912, 225927:

225908:
- Reorder default ps(1) output according to reality.

225912:
- there's no reason the semantics of the -x flag are being explained in
  the -a flag description
- be more precise regarding the relation between the -a flag and the
  security.bsd.see_other_uids sysctl
- describe the format of the -t flag's argument
- 'con' no longer is a possible entry in the 'TT' column
- explain that the 'TT' column refers to pseudo-terminals
  via mere numbers
- add a hint in the 'tt' keyword description that a
  keyword 'tty' exists, which will give the full terminal pathname

225859:
- Correct a typo that was introduced in 225912

git-svn-id: svn://svn.freebsd.org/base/stable/8@226191 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f