Refinements to the Wikimedia ruleset

dumps.wikimedia.org is currently excluded from the targets of the Wikimedia ruleset, but it supports SSL. There might be a reason I am not aware of to exclude it, but it does not appear to be so. The same applies to wiki-mail.wikimedia.org. It is a redirect to list.wikimedia.org, but it supports SSL, so it does not need to be excluded.

It appears that all Wikimedia wikis support secured cookies correctly, although I have not tested thoroughly (but there was already a declaration to secure them on Wikipedia, which uses the same architecture as the other Wikimedia wikis). The rules added here enable them on all Wikimedia websites that are wikis. The other websites would need to be looked at separately to make sure they really do support secured cookies, so I ignored them.