Commit 376226c1 broke building with OPENSSL_NO_ENGINE

[dirkfeytons]

I was building 2.0.14 on Linux against an OpenSSL that is built with OPENSSL_NO_ENGINE. The build failed in src/net.c because in net__tls_load_verify() there's a call to net__load_engine() but that function is not compiled in.
I traced it back to commit 376226c.

[ralight]

Thank you, that's not an option I've actually come across. That's now fixed and will be in 2.0.15.