curl security, bug fix, and enhancement update

7.29.0-42 - fix use of uninitialized variable detected by Covscan 7.29.0-41 - make FTPS work with --proxytunnel 1420327 7.29.0-40 - make FTPS work with --proxytunnel 1420327 7.29.0-39 - work around race condition in PK11FindSlotByName in NSS 1404815 7.29.0-38 - make FTPS work with --proxytunnel...