fix #H4333 - angry god vs pacifist conduct

fix #H4333 - angry god vs pacifist conduct

When you're swallowed, an angry god trying to zap you will kill
the engulfer and hero gets credit (experience) and blame (possible
loss of luck and/or alignment if engulfer is peaceful or tame) for
the act.  But hero didn't actually kill the critter, so don't
increment the kill counter that monitors pacifism.

I think there are other circumstances where hero gets credit and/or
blame for something he or she didn't directly do, but offhand I
can't think of them.  They might warrant similar treatment.

Tidying of xkilled() triggered by malformed block comment which is
actually a hybrid of an end of line comment (the boulder one, not
the 'dest' parameter one)....