etcmfs has been known to break when /etc gets too big, so
just remove it with a general /tmp partition that is set via
the tools.git through rc.conf and slap unionfs mounts on top.

Make "src" the implicit "/usr/local" so that nobody can
sneak in weird files in the base file system or potentially
overwrite them.

This is the last time, I swear...  :)

Also update the certificate generation process and put in our info.  :)

Now use the base system's tzdata, which we update regularly...