Stop using proprietary sun.security.x509.GeneralNameInterface

Description

In the code, `sun.security.x509.GeneralNameInterface` is used. This implementation is not available in all JDKs, and can cause issues while debugging / running tests with other JDKs.

The implementation is used only for one constant definition. We can copy the constant value in our code, instead of depending on proprietary code.

Environment

None
Fixed

Assignee

Guus der Kinderen

Reporter

Guus der Kinderen