This was preventing us from correctly sending BYE requests for hangup.

Signed-off-by: Tristan Matthews <tristan.matthews@savoirfairelinux.com>

It doesn't make sense to end it with 404 (NOT FOUND)

- Resize buffer depending on if we're dealing with ipv4 or 6.
- Don't try to get an IP list for an empty name.
- Remove redundant code.

This was caused by freeing the dialpad callback data after clicks.
It should only be freed when the dialpad is destroyed.

Manager never uses it and it should only be needed by SIP anyway.