fs.BoolVarP(flags,&Opt.NoModTime,"no-modtime","",Opt.NoModTime,"Don't read/write the modification time (can speed things up).")
fs.BoolVarP(flags,&Opt.NoChecksum,"no-checksum","",Opt.NoChecksum,"Don't compare checksums on up/download.")
fs.BoolVarP(flags,&Opt.NoSeek,"no-seek","",Opt.NoSeek,"Don't allow seeking in files.")
fs.DurationVarP(flags,&Opt.DirCacheTime,"dir-cache-time","",Opt.DirCacheTime,"Time to cache directory entries for.")
fs.DurationVarP(flags,&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.")