changed defauls for use sRTP and codec list for better interoperability

darcs-hash:20100408120048-58252-57aa295944b449224778cb03c7ba9bd78d28ea02
Replaced SIPURI in bonjour notification with FrozenSIPURI

Ignore-this: 8ad310ad9cf37bdba29e0b9c3c1760fc

darcs-hash:20100408132825-1e3d8-99c0bd0dc10899ac747b474dd2b70a9d306feeee