The SNTP package provides implementation of a client for RFC 2030, the
Simple Network Time Protocol (SNTP). The client listens for broadcasts
or IPv6 multicasts from an NTP server and uses the information
received to set the system's time of day clock. This will be either
the POSIX CLOCK_REALTIME clock or the wallclock device, or both,
depending on the configuration. It can also be configured to send
SNTP time requests to specific NTP servers using SNTP's unicast mode.