Add copyright and license link to .htm

wled00/data/settings_sec.htm

@@ -48,8 +48,8 @@
 		<a href="https://github.com/Aircoookie/WLED/" target="_blank">WLED</a> version ##VERSION##<!-- Autoreplaced from package.json --><br><br>
 		<a href="https://github.com/Aircoookie/WLED/wiki/Contributors-&-About" target="_blank">Contributors, dependencies and special thanks</a><br>
 		A huge thank you to everyone who helped me create WLED!<br><br>
-		(c) 2016-2019 Christian Schwinne <br>
-		<i>Licensed under the MIT license</i><br><br>
+		(c) 2016-2020 Christian Schwinne <br>
+		<i>Licensed under the <a href="https://github.com/Aircoookie/WLED/blob/master/LICENSE" target="_blank">MIT license</a></i><br><br>
 		Server message: <span class="sip"> Response error! </span><hr>
 		<button type="button" onclick="B()">Back</button><button type="submit">Save & Reboot</button>
 	</form>