Teleport_control is disabled while the hero is Stunned; do the same
with Polymorph_control. Also now disabled while unconscious, but that
is academic since random polymorphs and were-critter transformations are
postponed until multi is non-negative. I included it for completeness.
(Reverting to original form can occur while unconscious, but control is
not a factor in that situation. Teleporting handles being unconscious
differently but does negate control then.)
The fixes entry could just as easily have gone into the new features
section as into the bug fixes one. The teleport control part actually
belongs in fixes34.4 because it is present in the branch, but I didn't
feel like spreading this across two different files (and the current diff
references ``Unaware'' which doesn't exist in the branch so it isn't
trivial to include this patch there).