add d-man to 404 page (#2527)

Author: Flying-Toast

404.dd

@@ -1,12 +1,17 @@
 Ddoc
 
-$(D_S 404 Not Found,
+$(DIV class="center-children",
+$(D_S $(TITLE),
 
-$(P
-Page not found!
+$(HTMLTAG3 img, src="$(STATIC images/dman-scared.jpg)")
 
+$(P
 If you think there should be something here, please $(LINK2 $(BUGZILLA_NEW_BUG_URL)$(AMP)bug_severity=normal, report a bug).
-))
+)))
 
 Macros:
-    TITLE=404 Not Found
+    TITLE=Oh No! Page Not Found
+    EXTRA_HEADERS=$(T style,
+        .center-children, h1 { text-align: center; }
+        img { max-width: 100%; }
+    )