fix(postgres): Match ~/.pgpass password after URL parsing and fix user and database ordering

[D1plo1d]

This fixes two bugs in loading postgres passwords from ~/.pgpass files:

• pgpass was applied before parsing the database URLs so it wasn't matching against the host/port/user/database from the URL provided
• pgpass was matching user and database in the wrong order

[abonander]

@D1plo1d looks like cargo fmt just needs to be run and this is good to go.