siprtmp.py doesnt get any responses on REGISTER

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Steps to reproduce:
1. connect to siprtmp with videoPhone client
2. check "Remember me?" check box
3. reload videoPhone page random times when just connected or when a call was 
accepted
4. client will not reconnect after one of the next reloads

Expected results: videoPhone successfully reconnects to siprtmp (and siprtmp as 
well successfully reconnects to sip-proxy)

Got: videoPhone rases "connecting" popup, siprtmp sending REGISTER to 
sip-proxy, sip-proxy responses as usual (401 Unauthorised), but siprtmp doent 
get that response at all.

Using: rtmplite from trunk (rev 89), p2p-sip from trunk (rev 39), FreeBSD 8.2 
i386, python 2.6.7, Asterisk 1.8.4.4 as sip-proxy

Additional: when siprtmp cannot get response, _listener method on User class 
(p2p-sip/src/app/voip.py) gets nothing on yield multitask.recvfrom()

Do you need sip logs to prove the bug?

I will also duplicate this issue on p2p-sip project bugtracer, as it is related.

Original issue reported on code.google.com by [email protected] on 20 Jul 2011 at 10:34