Fix FTBFS - Move RECENT_DATE to 2017-06-30

As of 2018-01-01, python-urllib3 no longer builds because of the test
suite failure caused by RECENT_DATE not being recent enough.
RECENT_DATE was updated to 2017-06-30 upstream.

https://github.com/shazow/urllib3/issues/1303
4bff1e93d2

python-urllib3-recent-date.patch

@@ -0,0 +1,32 @@
+From 4bff1e93d2dd4663d422d7e290473d9189cec5db Mon Sep 17 00:00:00 2001
+From: Dominique Leuenberger <dimstar@opensuse.org>
+Date: Sun, 31 Dec 2017 15:11:16 +0100
+Subject: [PATCH] Move RECENT_DATE to 2017-06-30
+
+The test suite expects the current date to be no more than two years in the future
+of RECENT_DATE, which just serves as a reference point.
+
+Also clarify the comment about how to update RECENT_DATE
+
+Fixes #1303
+
+diff --git a/urllib3/connection.py b/urllib3/connection.py
+index 06bcbde1a..a03b573f0 100644
+--- a/urllib3/connection.py
++++ b/urllib3/connection.py
+@@ -56,10 +56,11 @@ class ConnectionError(Exception):
+     'https': 443,
+ }
+ 
+-# When updating RECENT_DATE, move it to
+-# within two years of the current date, and no
+-# earlier than 6 months ago.
+-RECENT_DATE = datetime.date(2016, 1, 1)
++# When updating RECENT_DATE, move it to within two years of the current date,
++# and not less than 6 months ago.
++# Example: if Today is 2018-01-01, then RECENT_DATE should be any date on or
++# after 2016-01-01 (today - 2 years) AND before 2017-07-01 (today - 6 months)
++RECENT_DATE = datetime.date(2017, 6, 30)
+ 
+ 
+ class DummyConnection(object):