Change all license headers to comply with REUSE specification. Fix #16132 Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github> Co-authored-by: John Olheiser <john.olheiser@gmail.com>
+build:
Go 1.17 and later use modern `//go:build` constraints, the old `// +build:` constraints should be removed.
Bypass the unstable behavior of Golang's mime.TypeByExtension