Expose authorized_hosts relation setting - Fix for lp:#1187508
README.markdown changes
allowed_hosts => sets.Set, just in case
s/,/:/ for a dict definition
Merge in latest from upstream
Address review feedback, allowed_hosts now contains unit name
Merged postgresql into charm-helpers.
Merged charm-helpers into cleanups.
Merge lp:~davidpbritton/charms/precise/postgresql/trunk, resolve conflicts, apply suggestions from https://code.launchpad.net/~davidpbritton/charms/precise/postgresql/trunk/+merge/171906/comments/390006
Fixes
Updated icon
This is to address Bug #1187508, where a client charm has no way of knowing if the credentials it has will actually work for it yet.

Simple change to set and export an "allowed-units" relation setting. This will show if you can connect to the database or not. Since the relations run asynchronously, there is no way to determine this otherwise. If your host is in the allowed_host setting, your client IP has been added to the hba conf file.
  Stuart Bishop 2013-07-16 Updated icon