[Serusers] protocol fixup: missing ACK after 200 OK

[Jamie Yukes]

I have a user agent that does not ACK after 200 OK.
Is it possible to configure SER  to generate an ACK and reply to 200 OK?

broken UA   ---- INVITE ---> ser 
                   <---- 100 ------- ser ---- INVITE ---> gateway
                           183                    183 
                                        ser <--- 200 OK---- gateway
broken UA  <---- 200 -----     ser
                      <------ 2 way RTP ----------->

Call is mostly established, but broken UA does not ACK the 200 OK.
Can we generate the following packet?
                                         ser --- ACK ---> gateway

This would allow the broken UA to interop.
Can SER generate this ACK?

Thanks,
Jamie Yukes