ci : start using OpenSSL

[angt]

[ngxson]

I think we should have CI dedicated to testing openssl instead of completely replace it.

The CI is suppose to validate the build with default config that will be pushed to end-user. If we aim to make openssl as default, we should change its default value in cmakelists instead.

[angt]

The idea is to remove completely the use of libcurl and all the code related. I'm waiting the boringssl PR to replace it everywhere :)

[ngxson]

The idea is to remove completely the use of libcurl and all the code related.

In this case, it makes more sense to the default value in cmakelists; probably also put up a deprecation warning when LLAMA_CURL is enabled

[angt]

The plan is to replace the current libcurl build with OpenSSL and BoringSSL (not only OpenSSL) first in the CI, then in all releases. If successful, I will deprecate the code by adding a warning message during the build process. And then changing the default.

I wouldn’t enable OpenSSL by default as a first step; this is guaranteed to make a lot of useless frictions.