Change the default USB template from the current 0 to -1. The reason
is that current one (mass storage device) doesn't work as it is - it
needs to be set to 0 after the LUN is configured, which is what the
cfumass rc script does. In other words: the current default does not
work, and to actually make it work it had to be set to -1 in
/boot/loader.conf.

Reviewed by: hselasky@
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation