Added a new local storage backed mount flavor (PR1) for sites where no network storage is available or wanted.
The new flavor is not so surprisingly just called local and uses the new LOCAL_BACKEND_DEST conf variable to specify where the local storage is or should be available after mount. The optional LOCAL_BACKEND_SRC can be used to specify that another actual local location should be bound onto LOCAL_BACKEND_DEST during mount.
Fixed a syntax error in the supplied migmount.conf.