boot2docker 1.0.0

Updates the boot2docker formula to version 1.0.0. This is the new, Go
based, boot2docker management utility. It's the official successor of
the old shell based version!
boot2docker: update 1.0.0 bottle.

Closes #29513.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Update Knot DNS to 1.4.7
knot: add 1.4.7 bottle.