Don't exit if the system is booting, should always be unnecessary. related to Ticket #5952
Clarify log, remove old commented out things that are unnecessary.
Kicking ntpd in rc.newwanip(v6) dates back to OpenNTPD which didn't have dynamic interface scanning support. This seems to be the source of crashes in ntpd as described in Ticket #4155, and appears to be unnecessary.
Move main pfSense content to src/