[Serusers] OPTIONS method

[Greg Fausak]

What, if anything, should the SER server do with a
OPTIONS method?  

I am receiving this method, from a phone, right after the
phone makes a conversation.  That is, the final ACK is
sent from the phone and a call is in progress when the phone decides
to send an OPTIONS message.  I thought OPTIONS was a pre-call
sort of thing, not for the current call.

Anyway, I thought I could just capture the OPTIONS method and send
a 486 busy reply with sl_send_reply().  Didn't work.

---greg