bridge (pb): connection can be set to used either UNIX socket or TCP socket: all settings are to be put in `[DEFAULT]` section - `bridge_pb_connection_type` can be set to `unix_socket` or `socket` - for `socket`, `bridge_pb_host` and `bridge_pb_port` can be specified

[DEFAULT]
media_dir = /src/sat_media

[jp]
# FIXME: default "auto" value cause trouble
background = dark