automatic administrator aliases are probably not bidirectional because the administrator@ address is an alias and not a user

Querying dpkg for each package is slow, and we have way too much output on installation because of it.

fix problem with certificate verification on OpenVZ servers

bidirectional alias controls: a new permitted_senders column in the aliases table allows setting who can send as an address independently of where the address forwards to

But the default permitted senders are the same as the addresses the alias forwards to.

Merge branch 'dhpiggott-bidirectional-alias-controls'

Contacts and Calendar are now versioned separately from ownCloud core.

Contacts appears to be in a v0.4.x.x series. This is the hash of v0.4.0.0.

Per https://github.com/owncloud/calendar/issues/892, Calendar is in a 0.7.x series. This is the hash for 0.7.2.

Only core. The apps don't seem to have been updated.

S3 backups fail if no prefix is used

Merges branch 'ponychicken-backup'.

* going from s3 to file target wasn't working
* use 'local' in the config instead of a file: url, for the local target, so it is not path-specific
* break out the S3 fields since users can't be expected to know how to form a URL
* use boto to generate a list of S3 hosts
* use boto to validate that the user input for s3 is valid
* fix lots of html errors in the backup admin

Also clarify a comment and remove an unneeded type check

Backup location and maximum age can now be configured in the admin panel.
For now only S3 is supported, but adding other duplicity supported backends should be straightforward.