linuxdvb: show the ioctl warnings only once
stream type: distinguish between AAC-LC/HE and newer AAC-LATM/LOAS
linuxdvb: rotor - remember the last orbital position to skip movement...
linuxdvb: do not monitor frontend in the diseqc/rotor setup

Also, move the active mux check outside tune0() function to
ensure, that the linux frontend is set again to requested
parameters (to be sure).
linuxdvb: add error log for the DTV_CLEAR cmd
mpegts: fix dvb_network_get_orbital_pos()