Get mail delivery to logs@mire.hcoop.net and logs@deleuze.hcoop.net working
* crontab (MAILTO): Send mail to logs@deleuze.hcoop.net rather than
logs@localhost, for easier sorting.
* denyhosts.conf (ADMIN_EMAIL): Ditto.
* exim4/conf.d/main/01_exim4-config_listmacrosdefs (unix_domains): Add
mire.hcoop.net so that mire relay to local aliases can work.
* exim4/conf.d/router/400_exim4-config_system_aliases (system_aliases):
Make this just look up local_part. Use /etc/aliases.local,
temporarily.
* exim4/conf.d/router/420_exim4-config_hosted_aliases: New file that
implements delivery to hosted domains. This does a full local_name and
domain lookup.
* exim4/conf.d/router/450_exim4-config_default_aliases: Write better
description of what this does.