SNTP hard-codes pool.ntp.org

[nwf]

IMHO, the SNTP compartment should probably...

• not hardcode pool.ntp.org
• instead, require the user to provide a fallback server (and connection rights)
• use DHCP-provided NTP server information (RFC 2132, section 8.3) as another available server, but that requires some work with the firewall and some way of capturing dynamic connection rights.