OpenSSL used to call exit(1) on syntax errors in OPENSSL_config(),
which is why we switched to CONF_modules_load_file() and introduced
a comment stating why. This behavior was however changed in OpenSSL
commit abdd677125f3a9e3082f8c5692203590fdb9b860, so remove the now
outdated and incorrect comment. The mentioned commit also declares
OPENSSL_config() deprecated so keep the current coding.
Closes#4033
Reviewed-by: Daniel Stenberg <daniel@haxx.se>