Add TLSv1 support for URLLIB2

This fix will allow MunkiReport-PHP when running on either OS X 10.10
Server or a newer version of Apache to use TLSv1 as the default
protocol when submitting data as Python by default uses SSL. Thanks to
https://gist.github.com/flandr/74be22d1c3d7c1dfefdd for the fix.
This will allow users to turn it off if they really want to.  Since this fix is only for 10.10 and newer so far it won't affect other users if they set it to False.