Added missing instantiation of SIPSimpleSettings

Ignore-this: 80c379becc901350ce06248873db319d

darcs-hash:20090504102540-1e3d8-b33554226538371a87d9ca04adc305af24aa879e
Added PJSIP patch to not end INVITE session when getting 408 to re-INVITE

darcs-hash:20090504104217-58103-23b227c4965ca9865cbbbc0080d6d61734cf3a71