docs: update calendar, add news item and link release notes for 18.2.0

Signed-off-by: Andres Gomez <agomez@igalia.com>

docs/index.html

@@ -17,8 +17,12 @@
 <h1>News</h1>
 <h2>September 7, 2018</h2>
 <p>
-<a href="relnotes/18.1.8.html">Mesa 18.1.8</a> is released.
-This is a bug-fix release.
+<a href="relnotes/18.1.8.html">Mesa 18.1.8</a> and
+<a href="relnotes/18.2.0.html">Mesa 18.2.0</a> are released.
+
+These are, respectively, a bug-fix release from the 18.1 branch and a
+new development release.  See the release notes for more information
+about the releases.
 </p>
 
 <h2>August 24, 2018</h2>

docs/release-calendar.html

@@ -46,11 +46,35 @@ if you'd like to nominate a patch in the next stable release.
 <td>Last planned 18.1.x release</td>
 </tr>
 <tr>
-<td rowspan="1">18.2</td>
-<td>2018-09-05</td>
-<td>18.2.0-rc6</td>
+<td rowspan="5">18.2</td>
+<td>2018-09-19</td>
+<td>18.2.1</td>
 <td>Andres Gomez</td>
-<td>Last planned RC/Final release</td>
+<td></td>
+</tr>
+<tr>
+<td>2018-10-03</td>
+<td>18.2.2</td>
+<td>Andres Gomez</td>
+<td></td>
+</tr>
+<tr>
+<td>2018-10-17</td>
+<td>18.2.3</td>
+<td>Andres Gomez</td>
+<td></td>
+</tr>
+<tr>
+<td>2018-10-31</td>
+<td>18.2.4</td>
+<td>Andres Gomez</td>
+<td></td>
+</tr>
+<tr>
+<td>2018-11-14</td>
+<td>18.2.5</td>
+<td>Andres Gomez</td>
+<td>Last planned 18.2.x release</td>
 </tr>
 </table>
 

docs/relnotes.html

@@ -21,6 +21,7 @@ The release notes summarize what's new or changed in each Mesa release.
 </p>
 
 <ul>
+<li><a href="relnotes/18.2.0.html">18.2.0 release notes</a>
 <li><a href="relnotes/18.1.8.html">18.1.8 release notes</a>
 <li><a href="relnotes/18.1.7.html">18.1.7 release notes</a>
 <li><a href="relnotes/18.1.6.html">18.1.6 release notes</a>