fix perl #126186 make all verbs allow an optional arg

fix perl #126186 make all verbs allow an optional arg

In perl #126186 it was pointed out we had started allowing name
arguments for verbs where we did not document them to be supported,
albeit in an inconsistent way. The previous patch cleaned up some
of the cause of this, but it seems better to just generally allow
the existing verbs to all support a mark name argument.

So this patch reverses the effect of the previous patch, and makes
all verbs, FAIL, ACCEPT, etc, allow an optional argument, and
set REGERROR/REGMARK appropriately as well.