(Correct) Support for OpenSSL >= 1.1

[welljsjs]

Take this PR as a follow-up to my old PR (#43) that added general support for OpenSSL >= 1.1.

This PR resolves some issues, f.ex. instead of accidentally freeing memory, I just reset it to zero.

Addressing some issues mentioned in #43.

Minor fixes regarding indentation.

Again, I'd squash the commits.