Support to WolfSSL (Step 1)

[thiagoftsm]

Summary

Fixes #6509

This PR is also fixing some issues when we compile netdata disabling ACLK.

Test Plan

1. Before to compile and test this branch, it is necessary to install wolfssl on your system. The default compilation of the library won't allow everything necessary to have ACLK debug messages and cloud, to fix this I compiled it using the following options:

# ./autogen.sh
# CFLAGS="-DOPENSSL_EXTRA -DHAVE_SECRET_CALLBACK -DWOLFSSL_TRUST_PEER_CERT" ./configure --prefix=/usr --enable-all --enable-static --enable-iopool --enable-secure-renegotiation --enable-sni
# make  CFLAGS="-DOPENSSL_EXTRA -DHAVE_SECRET_CALLBACK -DWOLFSSL_TRUST_PEER_CERT"
# make install
# ldconfig

2. Compile this branch without to modify any option.
3. Compile this branch enabling Wolfssl .
4. To confirm that this PR is working, you can access our API (https://localhost:19999/api/v1/info). It is suggested to use info endpoint, because you can test both SSL and streaming with it.

Additional Information

To support ACLK and cloud, it will be necessary to do more changes in the source code. So this is the first step to bring the library.

For users: How does this change affect me?

[Ferroin]

This is likely fine for an initial implementation, but we ideally need to update the ACLK code to work with WolfSSL.

[thiagoftsm]

I agree. We will need to modify our code, but I decide to proceed as a first step.