pfSense

Remove empty /etc/motd file, we already have hushlogin set to prevent it to show

Rename /etc/devd.conf -> /etc/pfSense-devd.conf and change start_devd()

Remove our copy of ddb.conf, it's exactly the same of FreeBSD's default

Remove copy of /etc/disktab and use FreeBSD's one

Remove copy of /etc/networks and use FreeBSD's one

Remove copy of /etc/pf.os and use FreeBSD's one

Remove passwd, master.passwd and group files

These files don't need to be present on pfSense main repo, they are
updated according our needs during first boot so we can use standard
file from FreeBSD

While here, do not try to run pwd_mkdb since it's already done by make...

Use 0 here if specified. Ticket #6413

Fix the autologin on serial console for ARM.

Change serial console to '3wire' and vt100.

Fixes the console on ARM.