Update to r48484:
Replace $FreeBSD$ with $FreeBSD$ because otherwise svn
expands them remorselessly into a misleading current value.

Update to r48360:
kern.ipc.acceptqueue -> kern.ipc.soacceptqueue

Update to r48296:
Add informations on how to use DHCP for NIC configuration.
Refine the Testing and Troubleshooting section.