update DCO

Signed-off-by: Terence Parr <[email protected]>

Author: parrt

license.html

@@ -106,24 +106,16 @@ <h1>ANTLR 4 License</h1>
 <br>
 <h1>Developer's Certificate of Origin</h1>
 
-<p>All contributors to ANTLR v4 must formally agree to abide by the
-<a href="https://github.com/antlr/antlr4/blob/master/contributors.txt">certificate
-of origin</a> by signing on the bottom of that document. To contribute:</p>
+<p>As of 4.10, ANTLR uses the Linux Foundation's Developer Certificate of Origin, DCO, version 1.1. See <a href="https://github.com/antlr/antlr4/blob/master/developer-cert-of-origin.txt">certificate
+of origin</a>. To contribute:</p>
 
 <ul>
-<li>fork the <a href="https://github.com/antlr/antlr4">ANTLR v4 github repository</a>
+<li>fork the dev branch of the <a href="https://github.com/antlr/antlr4">ANTLR v4 github repository</a>
 <li>make your changes
-<li>[<i>first time contributors</i>]: sign contributors.txt by adding your github userid, full
-name, email address (you can obscure your e-mail, but it must be
-computable by human), and date.
-<li>commit your changes
+<li>commit your changes, signing your commits with <tt>git commit -s ...</tt>.
 <li>send a pull request
 </ul>
 
-After you have signed once, you don't have to sign future pull
-requests. We can merge by simply checking to see your name is in the
-contributors file.
-
 	</div><!--/content-->
 
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