Version 4.4
ts2phc: check is_running in ts2phc_pps_sink_poll()
ts2phc: check for errors on polling the sink devices
timemaster: Wait for udev to set up vclock devices.
ts2phc: Fix description of holdover option in man page.
ts2phc: Describe servo options in man page.
nmea: Fix tm_isdst uninitialized
Complete SNMP cleanup.