DecodeToml decodes data from file using toml format.

EncodeToml encodes data into file using toml format, encode data to tmp file, if success then rename tmp => target file.

LoadConfig loads config from file, if fail return err.

Duration is a TOML wrapper type for time.Duration.

Size is a TOML wrapper type for size k/K -> KB, m/M -> MB, g/G -> GB.