add codespell action (#18818)

Original work here, #18474,  refixed and updated.

internal/http/close.go

@@ -27,11 +27,11 @@ import (
 // convenient wrapper to drain any remaining data on response body.
 //
 // Subsequently this allows golang http RoundTripper
-// to re-use the same connection for future requests.
+// to reuse the same connection for future requests.
 func DrainBody(respBody io.ReadCloser) {
 	// Callers should close resp.Body when done reading from it.
 	// If resp.Body is not closed, the Client's underlying RoundTripper
-	// (typically Transport) may not be able to re-use a persistent TCP
+	// (typically Transport) may not be able to reuse a persistent TCP
 	// connection to the server for a subsequent "keep-alive" request.
 	if respBody != nil {
 		// Drain any remaining Body and then close the connection.

internal/http/headers.go

@@ -118,7 +118,7 @@ const (
 	// Dummy putBucketACL
 	AmzACL = "x-amz-acl"
 
-	// Signature V4 related contants.
+	// Signature V4 related constants.
 	AmzContentSha256        = "X-Amz-Content-Sha256"
 	AmzDate                 = "X-Amz-Date"
 	AmzAlgorithm            = "X-Amz-Algorithm"

internal/http/listener.go

@@ -32,7 +32,7 @@ type acceptResult struct {
 
 // httpListener - HTTP listener capable of handling multiple server addresses.
 type httpListener struct {
-	tcpListeners []*net.TCPListener // underlaying TCP listeners.
+	tcpListeners []*net.TCPListener // underlying TCP listeners.
 	acceptCh     chan acceptResult  // channel where all TCP listeners write accepted connection.
 	ctx          context.Context
 	ctxCanceler  context.CancelFunc

internal/http/server.go

@@ -109,7 +109,7 @@ func (srv *Server) Init(listenCtx context.Context, listenErrCallback func(listen
 	wrappedHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		// If server is in shutdown.
 		if atomic.LoadUint32(&srv.inShutdown) != 0 {
-			// To indicate disable keep-alives
+			// To indicate disable keep-alive
 			w.Header().Set("Connection", "close")
 			w.WriteHeader(http.StatusServiceUnavailable)
 			w.Write([]byte(http.ErrServerClosed.Error()))