[metapost] polygonal pen bugs

[Karl Berry]

Regarding these difficult bugs, since it seems no one is jumping into
any actual fix (certainly not me), it occurs to me that I could at least
list this as a known problem looking for a solution on the
tug.org/help page (linking to this thread, I guess).

Perhaps even offer a reward (or grant, whichever way one wants to look
at it) for a suitable fix -- perhaps $500 or $1000.  Perhaps that would
inspire someone to delve into it.  Taco already passed, but surely there
is someone (other than John H. himself) with the requsite skills and
interest to deal with this ... Luigi? Dan?

k