SVR4 shadow file info wanted

[John F. Haugh II]

Can someone explain to me (without snooping about their source code)
what the new fields in the System V Release 4 /etc/shadow file are
for?  Four new fields were added since SVR3 and I don't have the
structure member names or their functions.

Please don't look at your source code to tell me this info - I need
the information to be "clean".  No verbatim copies from manuals
either.  As reward your name will appear in the credits the next
time I repost the shadow-login sources.
-- 
John F. Haugh II                             UUCP: ...!cs.utexas.edu!rpp386!jfh
Ma Bell: (512) 832-8832                           Domain: jfh at rpp386.cactus.org
"SCCS, the source motel!  Programs check in and never check out!"
		-- Ken Thompson