whats_next: when there are multiple responses like for NS records sort the responses so we can compare to a fixed order

Merges branch 'owncloud' of github.com:jkaberg/mailinabox
which is pull request #135, closes #135

thanks @jkaberg, @fmbiete, @owncloud

based on a script by @jkaberg in #141

owncloud will only let users access it from the PRIMARY_HOSTNAME (due to its trusted_domains option being set statically), so only include /cloud in the nginx configuration for PRIMARY_HOSTNAME

/cloud/index.php/apps/files/ajax/scan.php would not be parsed right because of two .php's

This lets downloads from the file app work.

owncloud: automatically set it up with an administrator account that even the box owner doesn't have access to, because we do not want to have the user hit ownCloud's setup page on first visit

owncloud: set forcessl to be true to get the corret HSTS header (would be better if we could prevent ownCloud from sending one)

when modifying php.ini, use ; as the comment char not # because php emits horrid deprecation warnings otherwise

x-accel-redirect dosn't need to process files in ownCloud data directory. TODO: fix for autogeneration

Conflicts:
	conf/nginx.conf
	setup/zpush.sh

tweak z-push/owncloud installation scripts: hide output, check if z-push needs an update, dont use /etc/timezone because its contents would need to be escaped before being passed into sed