Log Message:
Add --with-ioloop=best to CONFIGURE_ARGS and bump PKGREVISION.  The default
I/O loop method was changed from kqueue(2) to poll(2) in 1.0rc2, which has
been reported to cause problems on *BSD.  --with-ioloop=best selects kqueue
on platforms that implement it (*BSD), and poll on others.  You can use
"dovecot --build-options" to see what your binary has been compiled with.