Bump date missed in r202756

PR:		docs/171624
Approved by:	cperciva (implicit)

is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with:	imp, rwatson

I removed utmp and its manpage, but not other manpages referring to it.

I must have misread when I ported the original last(1) source code.
Instead of only processing the last 1024 entries, it reads them in in
chucks of 1024 entries at a time.

Unfortunately we cannot walk through the log file in reverse order,
which means we have to allocate a piece of memory to hold all the
entries. Call realloc() for each 128 entries we read.

Reported by:	Andrzej Tobola <ato iem pw edu pl>

Basically there are three major things I changed about last(1):

- It should use ut_type instead of determining by hand what type of
  record was given.
- It should now keep track of ut_id's instead of TTYs. This means the
  ttylist has been renamed to the idlist, storing all the ut_id's it has
  processed until the next reboot.
- I've removed the signal handler. Because our wtmp is rotated so often,
  it makes little sense. Even on a simple piece of hardware it should be
  capable of grinding through megabytes of logs in a second.

Also add some missing $FreeBSD$ to keep svn happy.

Submitted by:	Xin LI <delphij@frontfree.net>