security/openscep: Mark DEPRECATED
- This port is based on the RFC https://datatracker.ietf.org/doc/draft-nourse-scep/ which has been replaced with https://datatracker.ietf.org/doc/rfc8894/. Additionally this application has not been updated since 2003. Hence mark this port as DEPRECATED
- Set EXPIRATION_DATE to 2023-03-31
- Add LICENSE GPLv2
- Refactor the SSL IGNORE and SSL BROKEN macros