Goal === TODO / How to implement === Use unix sockets instead of TCP/IP to make Postgres connection. Better from security perspective and doesn't require port allocation. Switch to work via Unix socket (can be `trust`) for everything (management tasks) except the end-user connections. End user connections can (should?) be via TCP socket, but with the password required. (Currently `md5`, but we will need to support `ldap` as well, enterprise users need it 100%). Acceptance criteria ===