Glossary for letsencrypt.org/docs


#1

I created a Glossary for Let’s encrypt documentation and I would like your feedback: https://github.com/letsencrypt/website/pull/415

Ping @jsha because of https://github.com/letsencrypt/website/issues/380#issuecomment-427953056
Ping @DannyCarlton because of Should PKI, Web Certificates, Private Keys Be Simple To Explain?
Ping @david7364 because of Let's make Let's Encrypt easy and simple
Ping @georgeperez for spanish and @stevenzhu for chinese translation

If you are comfortable with GitHub, you can open PR’s for https://github.com/tdelmas/website/tree/glossary or directly comments the PR https://github.com/letsencrypt/website/pull/415 and use ```suggestion