Updated to latest release, 1.6.1. avahi is now detected during configure.
Requires ucommon>=6.0.0. Fix installation of setuid file. Use libnotify07
instead of libnotify. From ChangeLog:

from 1.6.0 to 1.6.1
- improved ssl configure check

from 1.5.0 to 1.6.0
- usage of new context aware intermediary voip functions
- fixes for official exosip2 4.0

from 1.4.0 to 1.5.0
- moved switchview into standalone package

from 1.3.3 to 1.4.0
- ucommon abi 6 support

from 1.3.2 to 1.3.3
- systemd related changes; env security model now parsed in system.cpp.
- systemd related changes; OPTIONS has -b default
- systemd related changes; pidfile support

from 1.3.1 to 1.3.2
- more qt automake options for strange qt configs
- fixed systemd support - soon to add to fedora
- sipwitch hotspot --public mode option

from 1.3.0 to 1.3.1
- initial support for exosip2/osip2 4.0
- more mingw32 build support

from 1.2.5 to 1.3.0
- contact for autoconfiguring clients; can be set in cfg or computed
- systemd support lands
- mingw32 build support
- osip2 published dev headers brokenly used derived packages config.h

from 1.2.4 to 1.2.5
- various source build issues with config.h and cleanup
- fixes for cmake pkgconfig searches
- fix group and user handling logic
- fix overlinking for runtime and plugins