- Update the 12.0 schedule to reflect releng/12.0 has branched,

and 12.0-RC1 builds have started.
- Add stable/12 and releng/12.0 to the security page.
- Add releng/12.0 to the releng index page.
- Document __FreeBSD_version 1200500.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation

en_US.ISO8859-1/books/porters-handbook/versions/chapter.xml

@@ -884,6 +884,13 @@ is spelled &amp;, < is &lt; and > is &gt;.
 	      updating <application>OpenSSL</application> shared
 	      library version numbers.</entry>
 	  </row>
+
+	  <row>
+	    <entry>1200500</entry>
+	    <entry><revnumber>r340471</revnumber></entry>
+	    <entry>November 16, 2018</entry> <entry>releng/12.0
+	      branched.</entry>
+	  </row>
 	</tbody>
       </tgroup>
     </table>

en_US.ISO8859-1/htdocs/releases/12.0R/schedule.xml

@@ -153,7 +153,7 @@
       <tr>
 	<td>&local.branch.releng; branch</td>
 	<td>16&nbsp;November&nbsp;2018</td>
-	<td>-</td>
+	<td>16&nbsp;November&nbsp;2018</td>
 	<td>Subversion branch created; future release engineering
 	  proceeds on this branch.</td>
       </tr>
@@ -161,7 +161,7 @@
       <tr>
 	<td>RC1 builds begin</td>
 	<td>16&nbsp;November&nbsp;2018</td>
-	<td>-</td>
+	<td>16&nbsp;November&nbsp;2018</td>
 	<td>First release candidate.</td>
       </tr>
 

en_US.ISO8859-1/htdocs/releng/index.xml

@@ -96,6 +96,13 @@
       <td>Development branch for FreeBSD 12-STABLE.</td>
     </tr>
 
+    <tr>
+      <td><tt>releng/12.0</tt></td>
+      <td>Frozen</td>
+      <td>&contact.re;</td>
+      <td>FreeBSD 12.0 supported errata fix branch.</td>
+    </tr>
+
     <tr>
       <td><tt>stable/11</tt></td>
       <td>Open</td>

en_US.ISO8859-1/htdocs/security/security.xml

@@ -151,6 +151,20 @@
       <th>Release Date</th>
       <th>Expected EoL</th>
     </tr>
+    <tr>
+      <td>stable/12</td>
+      <td>n/a</td>
+      <td>n/a</td>
+      <td>n/a</td>
+      <td>December 31, 2023 (anticipated)</td>
+    </tr>
+    <tr>
+      <td>releng/12.0</td>
+      <td>12.0-RELEASE</td>
+      <td>n/a</td>
+      <td>n/a</td>
+      <td>12.1-RELEASE + 3 months</td>
+    </tr>
     <tr>
       <td>stable/11</td>
       <td>n/a</td>