This reverts commit 5e4a6e8ac68b92c7394b80bb67839b71b4a4a00b, and
commit 60cf3f85b6e661482ec2705cadbdc1b04e388d19.
The original door API rewrite I posted had all rotation disabled using
the correct on_rotate() handler returning `false`. Two subsequent
changes attempting first to enable simple rotation and second disabling
that again changed the callback handler to a boolean `false`, which
is incorrect use in the screwdriver API, and actually allows rotation.
The proper way to disable rotation for facedir nodes it to use a full
callback handler that does `return false`.
6dcf541f6e