[css3-syntax] Expand the list of 2.1 core grammar changes.

Author: tabatkins

css3-syntax/Overview.html

@@ -3707,9 +3707,29 @@ <h3 id=changes-from-css-2.1-core-grammar><span class=secno>5.13. </span>
     with some reasonable behavior shown by at least one browser. Previously,
     stylesheets with those tokens in those places just didn't match the
     stylesheet grammar at all, so their handling was totally undefined.
+    Specifically:
+    <ul>
+     <li> [] blocks, () blocks and functions can now contain {} blocks,
+      at-keywords or semicolons
+
+     <li> Property values, functions and all blocks can now contain cdo and
+      cdc
+
+     <li> Selectors can now contain semicolons
+
+     <li> Selectors and at-rule predules can now contain cdo, cdc and
+      at-keywords
+
+     <li> Anything can contain an unmatched } ] or )
+    </ul>
 
    <li> Quirks mode parsing differences are now officially recognized in the
     parser.
+
+   <li> Selectors are no longer optional in rulesets a.k.a. style rules.
+    (Although an empty selector is invalid per css3-selectors, it does not
+    make ruleset invalid per the core grammar.)
+    <p class=issue> Do we want this? It's trivial to make it work.
   </ol>
 
   <h2 id=parser-entry-points><span class=secno>6. </span> Parser Entry Points</h2>

css3-syntax/Overview.src.html

@@ -3187,9 +3187,36 @@ <h3>
 			has been specified with some reasonable behavior shown by at least one browser.
 			Previously, stylesheets with those tokens in those places just didn't match the stylesheet grammar at all,
 			so their handling was totally undefined.
+			Specifically:
+
+			<ul>
+				<li>
+					[] blocks, () blocks and functions can now contain {} blocks, at-keywords or semicolons
+				
+				<li>
+					Property values, functions and all blocks can now contain cdo and cdc
+
+				<li>
+					Selectors can now contain semicolons
+
+				<li>
+					Selectors and at-rule predules can now contain cdo, cdc and at-keywords
+
+				<li>
+					Anything can contain an unmatched } ] or )
+			</ul>
 
 		<li>
 			Quirks mode parsing differences are now officially recognized in the parser.
+
+		<li>
+			Selectors are no longer optional in rulesets a.k.a. style rules. 
+			(Although an empty selector is invalid per css3-selectors, 
+			it does not make ruleset invalid per the core grammar.)
+
+			<p class='issue'>
+				Do we want this?  
+				It's trivial to make it work.
 	</ol>