[Savannah-hackers-public] disabling mailman html archiving

[Karl Berry]

Hello again sysadmins and savannah hackers,

I belatedly realized that the mailman html archives presumably are used
for lists with private archives, of which there are about 100.  I don't
know an easy way to only generate the html for private archives, while
omitting it for public.  Oh well.

Sorry,
Karl