The `certs` plugin extracted a certificate's Common Name and formatted its subject using string assumptions that only held for pre-3.x OpenSSL output, so a certificate with only a Common Name and no Subject Alternative Name reported no hostnames from `certs:report` and was not recognized during nginx config generation, while the subject report retained the `subject=` prefix and used the wrong separators. Normalizing the subject with `-nameopt` before parsing makes the extraction version independent across OpenSSL and LibreSSL.
The bash :report implementation for the certs plugin is replaced with a compiled golang binary. The certificate inspection getters run openssl and reproduce the existing field extraction, so the ssl report keys are unchanged, while collection now happens in parallel and json is marshalled directly. The now-unused fn-ssl-* display helpers are dropped, and fn-certs-set and fn-certs-remove remain for certs:add and certs:remove.
