Log Message:
sysutils/bcmfw

Because the firmware files do not strictly fall into the Free or
Open Source camps as explained in the Pkgsrc guide section 18.1.4,
introduce a bcmfw-license.

Also, because the licensing terms for the firmware files are not
especially clear, add NO_BIN_ON_* so that we don't distribute them
in an unapproved format.

prompted by gdt@