Remount Partition rw FreeBSD

Well, I messed up my rc.conf and ended up with a system stuck with / stuck in ro mode, and went to do the remount dance.

> mount -o remount,rw /dev/vtbd0p2
mount /dev/vtbd0p2: mount option <remount> is unknown: invalid argument

Drop the remount to get the following and your golden

mount -o rw /

Bam, fix your error and move on.