Add support for Wolf SSL

[thiagoftsm]

Summary

Fixes #6509

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

Additional Information

For users: How does this change affect me?

[vkalintiris]

@thiagoftsm I know this is a draft, but please consider exposing a common API for our ssl/hashing needs from a sub-component within libnetdata in order to avoid various ifdefs like these in the rest of the agent:

#if defined(OPENSSL_VERSION_NUMBER)
#include <openssl/sha.h>
#include <openssl/evp.h>
#elif defined(WOLFSSL_VERSION)
#include <wolfssl/openssl/sha.h>
#include <wolfssl/openssl/evp.h>
#endif

[thiagoftsm]

@thiagoftsm I know this is a draft, but please consider exposing a common API for our ssl/hashing needs from a sub-component within libnetdata in order to avoid various ifdefs like these in the rest of the agent:

#if defined(OPENSSL_VERSION_NUMBER)
#include <openssl/sha.h>
#include <openssl/evp.h>
#elif defined(WOLFSSL_VERSION)
#include <wolfssl/openssl/sha.h>
#include <wolfssl/openssl/evp.h>
#endif

All right @vkalintiris ,

I will reorganize the code, I began to write like this to observe compatibility between libraries, but I agree with you.

Best regards!

[ktsaou]

This needs to be implemented using the new SSL abstraction layer we implemented in #15113

[thiagoftsm]

All right @ktsaou ,

I am waiting for the PR to merged for me to return here.
I will take a look in other PR today yet.

Best regards!

[thiagoftsm]

Closing it, because we changed our submodules and it will be simpler for reviewers to start from scratch using our current structure.