Merge remote-tracking branch 'upstream/master'
Cert Check
Proper certificate validation
Merge remote-tracking branch 'upstream/master' into SSL-Check-Certificate
Style fixes
Handle NULL strings appropriately
Check for NULL certs
Merge pull request #621 from CodaFi/SSL-Check-Certificate

SSL certificate check for other platforms
Fixed #396: link with icucore explicitely
Added comment about QRESYNC and syncMessages behavior (#238)
Merge branch 'master' of https://github.com/MailCore/mailcore2