deployment guide improvements

[Danilo Tomasoni]

In deployment guide:
the line:

sql_engine = postgresql:///mediagoblin

should be replaced with the more informative

sql_engine = postgresql://your_mediagoblin_user@localhost/your_mediagoblin_database

[Christopher Allan Webber]

I'm not sure there's a sufficient reason to do this, so I'm closing this out. The existing version works great and is shorter.

[Christopher Allan Webber]

Originally posted by anongoblin but the spam filter mis-marked it:

I found the information I was looking for in this defect, so it certainly would have helped me if it was in the full format.

This is useful when the postgresql server isn't set up in the default manner, and runs under a different username/machine/database-name