recommend requests library (closes #23989)

Patch from Van Lindberg

Doc/library/http.client.rst

@@ -19,6 +19,11 @@ This module defines classes which implement the client side of the HTTP and
 HTTPS protocols.  It is normally not used directly --- the module
 :mod:`urllib.request` uses it to handle URLs that use HTTP and HTTPS.
 
+.. seealso::
+
+    The `Requests package <http://requests.readthedocs.org/>`_
+    is recommended for a higher-level http client interface.
+
 .. note::
 
    HTTPS support is only available if Python was compiled with SSL support

Doc/library/urllib.request.rst

@@ -12,6 +12,11 @@ The :mod:`urllib.request` module defines functions and classes which help in
 opening URLs (mostly HTTP) in a complex world --- basic and digest
 authentication, redirections, cookies and more.
 
+.. seealso::
+
+    The `Requests package <http://requests.readthedocs.org/>`_
+    is recommended for a higher-level http client interface.
+
 
 The :mod:`urllib.request` module defines the following functions: