Revert "Change FreeNAS text logo"

This reverts commit ef8df616a2bb5865ef86ca4c2ffcb9a2d7deb458.

The next set of commits will add hooks to the loader scripts
to facilitate doing this without modifying FreeBSD files.
Support for conditionally including files.

Include {menu,loader}.rc.local if they exist.

This allows us to overload a number of functions for
displaying logos.

Add hooks to run functions for logo/brand.

This allows you to specify a function to be run to
output the branch/logo via loader.conf.