fix generation of ROM_ID and remove checks for active OWX-device during restart, add attr 'interval'
fix OWX_FRM_Discover
Merge branch 'dev' into owx_reconnect
FRM: call OWX_Discover after reconnect
Merge branch 'owx_reconnect' into refactoring_owtherm

Conflicts:
	fhem/FHEM/21_OWTHERM.pm
Merge branch 'refactoring_owtherm' into owx_async

Conflicts:
	fhem/FHEM/21_OWAD.pm
	fhem/FHEM/21_OWCOUNT.pm
	fhem/FHEM/21_OWID.pm
	fhem/FHEM/21_OWMULTI.pm
	fhem/FHEM/21_OWSWITCH.pm