Fix License

Symlinking this file is okay.

SYNOPSIS

fix-license.sh <old> <new> [file]

DESCRIPTION

This script heads file and updates the SPDX license ID to new if the current ID found in the header is old. Otherwise, it’s a no-op.

If you omit file, it lists files from the index and worktree, and keeps calling itself with file filled until it processes all files. In this case, you must be at the root of your repo.