make aTV aware of PMS address(es)

- add PMSaddress to URL when calling PlexConnect
- get rid of aTV UDID '007'
- replace g_param[Addr_PMS] by local PMSaddress
Todo:
- when "search"ed for a file, replay settings are not renewed
- PMS re-discovery is currently not re-triggered when PMS wasn't seen
at startup.