Add the mailing list to the index html page.

Author: janpgit

docs/index.html

@@ -42,6 +42,15 @@ <h1>Unix/Linux Programming in C (NSWI015)</h1>
 </td></tr>
 </tbody></table>
 
+<p>
+<table bgcolor="lightgreen">
+<tbody><tr>
+<td>
+<font size="+1" color="black"><b>Make sure you subscribe yourself to the <a
+href="http://mbox.ms.mff.cuni.cz/listserv/listinfo/nswi015-l">nswi015-l mailing
+list</a> to stay current with what is going on.</b></font> </td></tr>
+</tbody></table>
+
 <h2>Contents</h2>
 
 <a href="#syllabus">Syllabus</a><br>