Update the 11.1-RELEASE schedule to reflect the code slush is

in effect.

Update the releng index page to reflect the same.

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

en_US.ISO8859-1/htdocs/releases/11.1R/schedule.xml

@@ -64,7 +64,7 @@
     <tr>
       <td>Code slush begins</td>
       <td>19&nbsp;May&nbsp;2017</td>
-      <td>-</td>
+      <td>19&nbsp;May&nbsp;2017</td>
       <td>Release Engineers announce that all further commits to the
 	&local.branch.stable; branch will not require explicit
 	approval, however new features should be avoided.</td>

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

@@ -84,7 +84,7 @@
 
     <tr>
       <td><tt>stable/11</tt></td>
-      <td>Open</td>
+      <td>Slush</td>
       <td>committers</td>
       <td>Development branch for FreeBSD 11-STABLE.</td>
     </tr>