[Dovecot] Patch: More of kqueue() support.

Hi, the attached patch contains these changes:

2005-12-15 22:18 Vaclav Haisman <v.haisman@sh.cvut.cz>

* src/lib/ioloop-kqueue.c: Fix IO_ERROR behaviour.
* src/lib/ioloop-notify-kqueue.c: New file.
* configure.in: Improve kqueue detection and handling. Cleanup.

The configure.in changes that are not related to kqueue are there to make autoconf 2.59, automake 1.9.6 and libtool 1.5.20 are happy.

The directory change notification is not really well tested because Dovecot doesn't seem to use it that much.

As per Brad's request I have changed all occurrences of FreeBSD to just BSD.

Vaclav Haisman