Fix #621 — Add a 'gecos' option to web_archive_spam_protection

Fix #613 — Avoid MHonArc’s search warning flood

Fix #624 — Correctly rename archive folder when renaming list

Fix #609 — Handle boilerplate db_type conf in sympa.pl --health_check

Add a button for full export of subscribers

Fix #27 — Missing admin function to bulk unsubscribe

Thx @ikedas for advices

This allows to make web archives public without fearing to leak users
email addresses.

- Currently, only light export is available, thus export doesn’t contain
  the name of the subscribers. The button solves that.
- The full export always includes a header:
  # Exported subscribers with search filter ""
  But it’s useless and maybe confusing when you use the full export from
  the button. I removed that header if no filter was sent.

Prevent unnecessary DB access in add_list_member

In add_list_member the value $current_list_members_count is discarded if max_list_member == 0 (default setting).
This prevents the "high db load" produced by the successive DB accesses.

Fix typo in bounced POD and improve wording.

Fix #31 — Fix order of list’s config params

Additional fix to #593

Add sympa.conf-dist

Fixed by opening aliases file as Sympa::LockedFile instance.
Note: To keep exclusive processing by file lock effective, file won't be closed (unlocked) before newaliases will be finised.

Sympa::Aliases::Template creates exclusive lock on local storage

Additional changes to: Salaun urennes1/fix scenario name with dots (#589)