[DEVELOPMENT] Set version to 3.10.1-SNAPSHOT.
Allow "step-up" even if in web.
Provide a tag for passable violations [not in strings].
[BLEEDING] Fixes for passable/rt preventing moving out of blocks.

Passable/ray-tracing might disallow players moving out of blocks which
they are stuck in on some occasions.
In order to allow moving out of a block, ray tracing is repeated
with the first block ignored for some cases.
Fix passable alerts with fence gates.

This workaround allows the block transition from above a 1.5 high block
into the block, for the case both from and to have been inside of the
bounds of the block. This should fix the annoying bug with jumping
inside of an open fence gate, closing it while just above 1.0 height,
so that passable would alert for moving back from air into the block.