(Bug 5265) Button to remove purged members
(Bug 5265) Redirect from /community/members?authas=abc

=> /communities/members/edit?authas=abc
  => /communities/abc/members/edit
(Bug 5265) Update links pointing from /community/members to
/communities/.../members/edit

Deletes htdocs/community/members.bml; we're done with it.

Also brings back /community/members.bml.text because a bunch of places
still use these text strings.