Revert "First stage of access logging middleware. Initially without any output appenders."

This reverts commit 73a1b172ed.

middlewares/saveBackend.go

@@ -0,0 +1,20 @@
+package middlewares
+
+import (
+	"net/http"
+)
+
+// SaveBackend sends the backend name to the logger.
+type SaveBackend struct {
+	next http.Handler
+}
+
+// NewSaveBackend creates a SaveBackend
+func NewSaveBackend(next http.Handler) *SaveBackend {
+	return &SaveBackend{next}
+}
+
+func (sb *SaveBackend) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+	saveBackendNameForLogger(r, (*r.URL).String())
+	sb.next.ServeHTTP(rw, r)
+}