Seeking opinions...

One of my old projects, RTMPdump, relies on OpenSSL for some crypto primitives, but the APIs it uses have been deprecated in 1.1 and newer. I'm wondering whether and how to support the newer versions.

Since we're supporting an ancient proprietary protocol, adopting new APIs to allow supporting newer encryption schemes is irrelevant. Avoiding weaknesses in older ciphers is also irrelevant, we have to use what Adobe used, and nothing else.