Make python2-urllib2 compatible with more Python 2.7 versions
Make python2-urllib2 compatible with more Python 2.7 versions

Try to catch ssl.CertificateError only if CertificateError is
defined. Otherwise bail out by effectively doing a dummy
"catch ():".

ouspg/trytls,ouspg/trytls,ouspg/trytls,ouspg/trytls,ouspg/trytls,ouspg/trytls,ouspg/trytls,ouspg/trytls