Change emacsbugs addresses in old, open debbugs.gnu.org reports?

[Glenn Morris]

cc to emacs-devel, followup-to: address@hidden

Does anyone have an opinion as to whether I should edit the old, open
reports on debbugs.gnu.org, to replace "emacsbugs.donarmstrong.com"
addresses with "debbugs.gnu.org" addresses? This only affects people
replying to Emacs bug reports earlier than #5286 (ie, before 2010) who
respond by replying to an old email and forget to correct the address.

The old addresses still work, but get vast amounts of spam to this
today. It would be good to be able to increase their spam score and not
worry about losing the (very few) valid mails that sometimes come in.