Made sip_auto_publish_presence script use sip_publish_interval setting

Ignore-this: b43078ab12b4043026fc528675581122

darcs-hash:20090222160811-1e3d8-3b835f21427dd95ec09eff6f2cb4e8ba01175515
Made sip_publish_presence script use sip_publish_interval setting

Ignore-this: 85db579c85383fb712064b21d610ae85

darcs-hash:20090222161104-1e3d8-f728e1d43cbdff91dd6eb4906d99805a33d73a57