readme: Add zerossl

README.md

@@ -1,6 +1,9 @@
 <p align="center">
 	<a href="https://caddyserver.com"><img src="https://user-images.githubusercontent.com/1128849/36338535-05fb646a-136f-11e8-987b-e6901e717d5a.png" alt="Caddy" width="450"></a>
+	<br>
+	<h3 align="center">a <a href="https://zerossl.com"><img src="https://caddyserver.com/resources/images/zerossl-logo.svg" height="28" valign="middle"></a> project</h3>
 </p>
+<hr>
 <h3 align="center">Every site on HTTPS</h3>
 <p align="center">Caddy is an extensible server platform that uses TLS by default.</p>
 <p align="center">
@@ -150,7 +153,9 @@ Please use our [issue tracker](https://github.com/caddyserver/caddy/issues) only
 
 ## About
 
-**The name "Caddy" is trademarked.** The name of the software is "Caddy", not "Caddy Server" or "CaddyServer". Please call it "Caddy" or, if you wish to clarify, "the Caddy web server". Caddy is a registered trademark of Light Code Labs, LLC.
+**The name "Caddy" is trademarked.** The name of the software is "Caddy", not "Caddy Server" or "CaddyServer". Please call it "Caddy" or, if you wish to clarify, "the Caddy web server". Caddy is a registered trademark of apilayer GmbH.
 
 - _Project on Twitter: [@caddyserver](https://twitter.com/caddyserver)_
 - _Author on Twitter: [@mholt6](https://twitter.com/mholt6)_
+
+Caddy is a project of [ZeroSSL](https://zerossl.com), an [apilayer](https://apilayer.com) company.