[e] (0) Clarify that processing of action='' (empty) is wrong per RFC…

…3986. (credit: tb)

git-svn-id: http://svn.whatwg.org/webapps@2377 340c8d12-0b0e-0410-8428-c7bf67bfef74

index

@@ -27973,11 +27973,22 @@ interface <dfn id=htmloptionelement>HTMLOptionElement</dfn> : <a href=#htmleleme
 
    <li><p>Let <var title="">action</var> be the <var title="">submitter</var> element's <a href=#concept-fs-action title=concept-fs-action>action</a>.</li>
 
-   <li><p>If <var title="">action</var> is the empty string, let <var title="">action</var> be <span>the document's address</span><!--
-   XXXDOCURL -->.</p> <!-- Don't ask me why. But that's what IE
-   does. It even treats action="" differently from action=" " or
-   action="#" (the latter two resolve to the base URL, the first one
-   resolves to the doc URL) -->
+   <li>
+
+    <p>If <var title="">action</var> is the empty string, let <var title="">action</var> be <span>the document's address</span><!--
+    XXXDOCURL -->.</p>
+
+    <p class=note>This step is a willful violation of RFC 3986. <a href=#refsRFC3986>[RFC3986]</a></p>
+
+    <!-- Don't ask me why. But that's what IE does. It even treats
+    action="" differently from action=" " or action="#" (the latter
+    two resolve to the base URL, the first one resolves to the doc
+    URL). And other browsers concur. It is even required, see e.g.
+      http://bugs.webkit.org/show_bug.cgi?id=7763
+      https://bugzilla.mozilla.org/show_bug.cgi?id=297761
+    -->
+
+   </li>
 
    <li><p><a href=#resolve-a-url title="resolve a url">Resolve</a> the
    <a href=#url>URL</a> <var title="">action</var>. If this fails, abort

source

@@ -31512,12 +31512,24 @@ interface <dfn>HTMLOptionElement</dfn> : <span>HTMLElement</span> {
    title="">submitter</var> element's <span
    title="concept-fs-action">action</span>.</p></li>
 
-   <li><p>If <var title="">action</var> is the empty string, let <var
-   title="">action</var> be <span>the document's address</span><!--
-   XXXDOCURL -->.</p> <!-- Don't ask me why. But that's what IE
-   does. It even treats action="" differently from action=" " or
-   action="#" (the latter two resolve to the base URL, the first one
-   resolves to the doc URL) -->
+   <li>
+
+    <p>If <var title="">action</var> is the empty string, let <var
+    title="">action</var> be <span>the document's address</span><!--
+    XXXDOCURL -->.</p>
+
+    <p class="note">This step is a willful violation of RFC 3986. <a
+    href="#refsRFC3986">[RFC3986]</a></p>
+
+    <!-- Don't ask me why. But that's what IE does. It even treats
+    action="" differently from action=" " or action="#" (the latter
+    two resolve to the base URL, the first one resolves to the doc
+    URL). And other browsers concur. It is even required, see e.g.
+      http://bugs.webkit.org/show_bug.cgi?id=7763
+      https://bugzilla.mozilla.org/show_bug.cgi?id=297761
+    -->
+
+   </li>
 
    <li><p><span title="resolve a url">Resolve</span> the
    <span>URL</span> <var title="">action</var>. If this fails, abort