flags.BoolVarP(flagSet,&Opt.NoModTime,"no-modtime","",Opt.NoModTime,"Don't read/write the modification time (can speed things up).")
flags.BoolVarP(flagSet,&Opt.NoChecksum,"no-checksum","",Opt.NoChecksum,"Don't compare checksums on up/download.")
flags.BoolVarP(flagSet,&Opt.NoSeek,"no-seek","",Opt.NoSeek,"Don't allow seeking in files.")
flags.DurationVarP(flagSet,&Opt.DirCacheTime,"dir-cache-time","",Opt.DirCacheTime,"Time to cache directory entries for.")
flags.DurationVarP(flagSet,&Opt.PollInterval,"poll-interval","",Opt.PollInterval,"Time to wait between polling for changes. Must be smaller than dir-cache-time. Only on supported remotes. Set to 0 to disable.")
flags.FVarP(flagSet,&Opt.ChunkSize,"vfs-read-chunk-size","","Read the source objects in chunks.")
flags.FVarP(flagSet,&Opt.ChunkSizeLimit,"vfs-read-chunk-size-limit","","If greater than --vfs-read-chunk-size, double the chunk size after each chunk read, until the limit is reached. -1 is unlimited.")