feat: add authn-basic layer

internal/proxy/director/layer/authn/basic/util.go

@@ -0,0 +1,11 @@
+package basic
+
+func stripNonASCII(s string) string {
+	rs := make([]rune, 0, len(s))
+	for _, r := range s {
+		if r <= 127 {
+			rs = append(rs, r)
+		}
+	}
+	return string(rs)
+}