add cgi.py to the distribution

CHANGELOG

@@ -47,6 +47,10 @@ DOCUMENTATION:
 
 VENDORED SOFTWARE:
 
+* A version of cgi.py from the Python standard library is now included in the
+  distribution, since that module will be removed from the standard library in
+  3.13 and we depend on it for parsing form data.
+
 
 ##################
 # Version 19.0.4 #

LICENSE.included_software

@@ -39,6 +39,16 @@ For more information, please refer to <http://unlicense.org/>
 ########
 
 
+CAT-SOOP contains a slightly-modified copy of cgi.py from the Python standard
+library (removed in Python 3.13).  Information about its authorship can be
+found in the file itself, and the original file is licensed under the terms
+described at the following link:
+  https://docs.python.org/3/license.html#psf-license-agreement-for-python-release
+
+
+########
+
+
 CAT-SOOP contains a slightly-modified version of highlight.js, a Javascript
 library for syntax highlighting (https://highlightjs.org/).  In particular,
 syntax highlighting of Python code was modified to include more built-in names.

catsoop/dispatch.py

@@ -18,7 +18,6 @@ Methods for handling requests, or for routing them to the proper handlers
 """
 
 import os
-import cgi
 import string
 import hashlib
 import colorsys
@@ -40,6 +39,8 @@ from . import session
 from . import language
 from . import base_context
 
+from .thirdparty import cgi
+
 _nodoc = {"CSFormatter", "formatdate", "dict_from_cgi_form", "md5"}