ttl missing for dmarc-recods (Fixes #4807)

Author: Florian Schaal

interface/web/dns/templates/dns_dmarc_edit.htm

@@ -136,6 +136,13 @@ <h1><tmpl_var name="list_head_txt"></h1>
 					<select name="dmarc_sp" id="dmarc_sp" class="form-control">{tmpl_var name='dmarc_sp'}</select>
 				</div>
             </div>
+            
+			<div class="form-group">
+                <label for="ttl" class="col-sm-2 control-label">{tmpl_var name='ttl_txt'}</label>
+                <div class="col-sm-3">
+					<input type="text" name="ttl" id="ttl" value="{tmpl_var name='ttl'}" class="form-control" />
+				</div>
+			</div>
 
             <div class="form-group">
                 <label class="col-sm-2 control-label">{tmpl_var name='active_txt'}</label>