restore MDActivationDelay in the mod_md documentation

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1926075 13f79535-47bb-0310-9956-ffa450edef68

Author: icing

docs/manual/mod/mod_md.xml

@@ -1311,6 +1311,20 @@ MDMessageCmd /etc/apache/md-message
         </usage>
     </directivesynopsis>
 
+    <directivesynopsis>
+        <name>MDActivationDelay</name>
+        <description>How long to delay activation of new certificates</description>
+        <syntax>MDActivationDelay <var>duration</var></syntax>
+        <contextlist>
+            <context>server config</context>
+        </contextlist>
+        <compatibility>Available in version 2.4.42 and later</compatibility>
+        <usage>
+            <p>
+            </p>
+        </usage>
+    </directivesynopsis>
+
     <directivesynopsis>
         <name>MDContactEmail</name>
         <description>Email address used for account registration</description>