Function transmission_sys::tr_ctorSetMetainfoFromHash

pub unsafe extern "C" fn tr_ctorSetMetainfoFromHash(
    ctor: *mut tr_ctor, 
    hashString: *const c_char
) -> c_int

@brief Set the metainfo from an existing file in tr_getTorrentDir().

This is used by the Mac client on startup to pick and choose which torrents to load