Added support for RFC 850 style dates, as used by some HTTP servers

(such as Netscape-Commerce and CERN).

An example of a RFC 850 date: 'Wednesday, 18-Dec-96 21:00:00 GMT'

From: Chris Lawrence <quango@themall.net>

Lib/rfc822.py

@@ -417,6 +417,10 @@ def parsedate_tz(data):
 	if data[0][-1] == ',':
 		# There's a dayname here. Skip it
 		del data[0]
+	if len(data) == 3: # RFC 850 date, deprecated
+		stuff = string.split(data[0], '-')
+		if len(stuff) == 3:
+			data = stuff + data[1:]
 	if len(data) == 4:
 		s = data[3]
 		i = string.find(s, '+')