* Add Debbugs::Control which will eventually contain most of the
control actions which are currently stuck in service.in
* Add bug_archive and bug_unarchive routines which are called by
service.in and expire.in as appropriate
* Change expire.in to use bug_archive
* Test archival and unarchival in 06_mail_handling.t
* Document archive and unarchive control commands
* Add control_request* configuration variables for the fake messages
appended to the log when bugs are archived/unarchived internally.
* Move escape_log to Debbugs::Log and rename it
* Change all usages of escapelog to escape_log; escape_log now
returns a list instead of pointlessly using an ARRAYREF.
* No longer export things by default from Debbugs::Log
* Move logreadbugmerge to Debbugs::Status where it should have been
originally
* Use append_action_to_log in Debbugs::Control (possibly should be in
Debbugs::Log) instead of duplicating it everywhere. [It's still
duplicated in service.in's -1.log, but sue me.]