lower registration "expires" setting. useful when the program crashes.

darcs-hash:20081126163101-b2873-06106b23d7f990a52eead272c0d872ef2bbcc03a
Fixed config type in sip_publish_presence

darcs-hash:20081126154241-1e3d8-2c32e0a52174bcf8752929ade50835397ba42eb8