Add properties for Basic and Bearer Authorization values

 
 # XXX import configparser
 # XXX import os
+import base64
 import re
 
 import httpagentparser

     """"""
 
     def __str__(self):
+        if self.header.startswith("Basic "):
+            return self.basic
+        elif self.header.startswith("Bearer "):
+            return self.bearer
+
+    @property
+    def basic(self):
+        return base64.b64decode(self.header.removeprefix("Basic ")).decode()
+
+    @property
+    def bearer(self):
         return self.header.removeprefix("Bearer ")
 
     _meta = ""