Remove hardcoded dbhost so I can keep using PGHOST. Display a better message when the user have no preferred email address set. Patches applied:
* guilherme.salgado@canonical.com/launchpad--devel--0--patch-211 merge from rf
* guilherme.salgado@canonical.com/launchpad--devel--0--patch-212 Better message when the user have no preferred email address set.
* guilherme.salgado@canonical.com/launchpad--devel--0--patch-213 merge from rf
* guilherme.salgado@canonical.com/launchpad--devel--0--patch-214 Fix dsn to hardcode only the 'launchpad' username and leave the dbhost to environment settings.