bug 1017: If the certificate was signed by the class3, include the subroot
when installing

Signed-off-by: Michael Tänzer <neo@nhng.de>
Revert "bug 1017: If the certificate was signed by the class3, include the subroot" because it doesn't work

This reverts commit fc14edae064d7726e08838ad1bfb163f24463265.
bug 1017: Whitespace cleanup
bug 1017: Directly allow for copy&paste of created client certificate