VMM/{Account,common,maillocation}: Dovecot version (check) fixes.
- Account: fixed versions dependencies.
- maillocation: use the version string, may be uses in a error message.
- common: version_hex() raises a ValueError, instead of returning 0,
if the version string is invalid.
.. Substitutions in section 1
.. |account.disk_usage| replace:: `account.disk_usage`
.. _account.disk_usage: vmm.cfg.5#account-disk-usage
.. |domain.force_deletion| replace:: `domain.force_deletion`
.. _domain.force_deletion: vmm.cfg.5#domain-force-deletion
.. |misc.transport| replace:: `misc.transport`
.. _misc.transport: vmm.cfg.5#misc-transport
.. #EOF