Mostly compiling cleanups but also one bugfix when index wasn't exclusively locked while it was being fsck'ed - that doesn't normally happen without crashing/whatever.

v0.99.2 2002-11-26 Timo Sirainen <tss@iki.fi>

+ If we have to wait for a lock longer, the client is now notified
  about it every 30 seconds.
- Default settings still pointed to lib directory instead of the
  libexec directory where the binaries were actually installed
- vpopmail support had to be kludged to fix a bug in vpopmail library
  which sometimes left extra character after the user name.
- Login process crashed if master process didn't let some user login.
  Normally this couldn't happen without error in configuration.
- select() based I/O loop wasn't working so Dovecot didn't work in
  eg. OSX. Also PAM authentication wasn't detected with OSX.
- Didn't compile with NetBSD-current