Fix Issue 10753 - Don't quote ;=, in the PATH_INFO envvar.
diff --git a/Lib/wsgiref/util.py b/Lib/wsgiref/util.py
index ae982f0..1f1e6cc 100644
--- a/Lib/wsgiref/util.py
+++ b/Lib/wsgiref/util.py
@@ -64,7 +64,7 @@
     """Return the full request URI, optionally including the query string"""
     url = application_uri(environ)
     from urllib.parse import quote
-    path_info = quote(environ.get('PATH_INFO',''))
+    path_info = quote(environ.get('PATH_INFO',''),safe='/;=,')
     if not environ.get('SCRIPT_NAME'):
         url += path_info[1:]
     else: