Implements systemd's Boot Loader Specification
This API can parse and modify a Boot Loader Spec entry file. It supports the Fedora/GRUB specific commands.
This library can be used in a no_std environment that supports dynamic memory allocation by disabling the "std" feature using --no-default-features.
NOTE: At the moment, if you parse a BLSEntry with full-line comments and write it back, all comment lines will be consolidated in the header.