retain backups only for 3 days; beyond that the user is responsible for copying files off of the machine

see #231, #201, b26abc94, 7ca54a2b, dfe0a9f1

see #231, #201, b26abc94.

Jump to the panel_aliases anchor (top) to directly edit the selected alias

delay an ajax call to see if this fixes the problem of the loading indicator not going away after showing the user a panel after login

Change owner of spamassassin directory from mail to spampd, closes #231

Pass additional_records to recursive build_zone calls, closes #229

The problem was that custom records defined for a subdomain where implicit
records are otherwise defined (e.g. A/AAAA records for the root) were ignored.

Though additional_records for a subdomain are processed in the base call to
build_zone (the call for the parent domain), and so custom records that don't
override implicits were working fine, those that overrode implicits were
ignored.

This was because the recursive call to build_zone for the subdomain creates the
implicit records (including A/AAAA records for the root), and so by relying on
the base call to add the additional_records fails because has_rec returned
true.

Adding a subdomain's additional_records in the child call works because has_rec
returns false when testing whether to add an e.g. A/AAAA override for the root,
as the defaults have not yet been added.

see http://discourse.mailinabox.email/t/recommend-a-different-android-carddav-and-caldav-android/102/1

status check on ns records should now take into account that secondary dns may be customized, see #223

When executed "cat bootstrap.sh | bash", apt-get mangled stdin. The script would terminate at the end of the if block containing apt-get (that seems to be as much as bash read from the pipe) and the remainder of the script was output to the console. This was very weird.

Ensuring that apt-get and git have their stdins redirected from /dev/null seems to fix the problem.

see #224

fixes #151
fixes #223

since the management server binds to 127.0.0.1, must use that and not 'localhost' to connect to it because 'localhost' resolves to the IPv6 ::1 when it is available, see #224