opensips: return immediately when updating data

This might avoid opensips blocking waiting for a response on `save("location")` ?
Update changelog for 0.0.167 release
opensips: do not forward REGISTER messages when unnecessary

This indicates limitations with our implementation; this is a workaround for situations where we didn't know how to deal with the REGISTER message (e.g. GRUU).
Also moved `forwarder` module at the bottom of the list of modules so that it can pick up the `do_not_forward_register` configuration flag.
Update changelog for 0.0.168 release
opensips: testing newer `request` version.

Hoping for pooling.
Update changelog for 0.0.169 release
opensips: also block REGISTER forwarding in loose-routed path.
Update changelog for 0.0.170 release
debian: `nice` installation
opensips: only attempt registration lookup if the user is a registered user.

This allows us to send 404 on non-existing user vs 486 on non-registered user.
Update changelog for 0.0.171 release
opensips: fix contact on ACK
lib/ccnq3: add supercouch support.
group creation