readline support in samba

[Andrew Tridgell]

I'm about to remove all the readline support in Samba again as it is
badly broken. I've done this once before but it was (erroneously)
restored by someone else.

If you want readline support in Samba then either volunteer to fix it
or find someone willing to fix/maintain it. Problems with the current
code include:

- it links in the readline library to all progs. It is ridiculous for
  smbd to have readline linked in.

- it fails to link other necessary libraries. On my box it fails to
  add ncurses, so Samba doesn't build without manual Makefile editing.

- it fails to handle keepalive packets. This is the hard point. It is
  solveable, but you will need to do creative things with timers and
  signals. This *must* be solved for readline support to be in
  Samba. If you don't know what a keepalive packet is then do some
  reading before sending a patch.

- the patch is ugly. It should abstract out functionality not have a
  big #ifdef in client.c

speak up now if you want to save this feature. Anyone just saying how
important the feature is but not actually offering to solve the
problems will be ignored.

Cheers, Tridge