inconsistency going down a hole/trapdoor accidentally vs deliberately

Noted on rgrn, after being told that you don't fit upon discovery
of a hole or trap door you could then immediately use '>' to
proceed down.

The deliberate situation remains possible and has some
inherent risk.

doc/fixes36.2

@@ -80,6 +80,7 @@ succubus/incubus seduction might result in loss of levitation which in turn
 	could drop the hero onto a trap that transports him/her elsewhere;
 	seduction was proceeding as if nothing unusual had happened
 #turn command which aggravated monsters did so without using a turn (not a pun)
+fix hole/trapdoor passage inconsistency when polymorphed into a giant
 
 
 Fixes to Post-3.6.1 Problems that Were Exposed Via git Repository