Contacts are now properly removed from the registrar when they are removed from the static records file (redis & edge-cases untested)
The signal handler for SIGUSR1 & SIGUSR2 is now verifiably signal-safe by using a Unix pipe wired to the sofia main loop.
An overload of RegistrarDb::clear taking a SipUri was added for convenience when calling from internal code.
Awaits !786 (merged)