alps frequently fails to start (e.g. during a system activation script)
since either its configured imap or smtp servers are not reachable
yet (i.e. their process has not yet opened the corresponding port).
This should hopefully fix that behaviour:
- also set BindsTo, telling systemd to only start alps once the
required units have entered "active" state (not just after it has
started them)
- also require postfix to be present, since that provides smtp
the bind mount module has been tweaked in a couple ways:
- rename hexchen.* to hacc.*
- rename bindmount to bindMount to make it consistent with usage in
the nixpkgs container module
- add a hacc.bindToPersist option as shorthand for prepending /perist
to a path via bind mount
the nopersist module has been shortened a little by moving
service-specific things which are used once out into the individual
service files, and removing those which we don't need at all (this also
means we get to loose a mkForce or two in case of mismatches between
hexchen's and our current config).
we decided to:
- get rid of unused packages
- simpify the directory layout since we only have one host anyways
- move our docs (such as they are) in-tree
