Nginx: Use cloaked database credentials.
Issue #1635622 by anarcat - Default nginx config doesn't talk to the default php-fpm config in Debian Wheezy and sid.
Issue #1972286 by darthsteven: don't check arguments on provision-save

we are not getting all possible contexts because there's no easy way
to enumerate them, so instead we just don't check
Add placeholder for subdirs.
Issue #2005698 by lieb: Fixed Invalid argument supplied for foreach() Service.php:144.
Add autoloading for our future classes.
Add templates for subdirs configuration files.
Generate subdir config files in a pre hook, pending re-factoring into proper Config, Service and/or Context classes.
Fix logging.
Add functions to delete subdir config files.
Re-write aliases in sites.php for subdirectories.
Fix docs.
Use a new variable for our exploded subdir alias.
Handle subdirectories on additional site tasks.
Move to pre_ hooks so that we don't have to restart Apache again.
Support disabling and re-enabling subdirectory sites.
Only re-write our own aliases in sites.php.
Add placeholder for subdirs.
Add autoloading for our future classes.
Add templates for subdirs configuration files.