ext/openssl: fix libressl build.

[devnexen]

No description provided.

[devnexen]

subsidiary question, is this value still valid today ? Seems openssl had updated it circa 2016 to 512.

[devnexen]

ping @bukka when you can, it s a little change :)

[nielsdos]

I guess I'm not understanding something here, I built the 8.2 branch with libreSSL and the build just worked fine.
This may be because in my configuration OPENSSL_NO_ENGINE was defined in my libreSSL build, but I'm not seeing a way to enable that (I'm not a libreSSL specialist).

[devnexen]

So the only case I know is openbsd, however I realise last year they added OPENSSL_NO_ENGINE to their system libcrypto settings.

[nielsdos]

So the only case I know is openbsd, however I realise last year they added OPENSSL_NO_ENGINE to their system libcrypto settings.

I'm building on Linux. I just tried v 3.8.0 which doesn't have that commit, but the build still works...

[devnexen]

So to summarize on OpenBSD :
1/ 7.3 and prior, linkage issue: implicit declaration of function ENGINE_cleanup.
2/ 7.4 and master no issue.

[nielsdos]

I trust you on this if it resolves the build for you. I don't see how this PR could cause issues so even if it were hypothetically wrong / not necessary it should be fine.