[css-flexbox-1] Add appendix for -webkit- aliases. w3c#5634

Author: fantasai

css-flexbox-1/Overview.bs

@@ -3598,6 +3598,37 @@ Appendix A: Axis Mappings</h2>
 				<td>right
 	</table>
 
+<h2 class="no-num" id="webkit-aliases">
+Appendix A: <code>-webkit-</code> Legacy Properties</h2>
+
+	<em>This appendix is normative.</em>
+
+	Advisement: These aliases are <em>deprecated</em>
+	and authors <em>should not</em> use them
+	unless their content needs to support actively-used legacy UAs.
+
+	For compatibility with general Web content,
+	UAs that are Web browsers must and other UAs may
+	implement the following [=legacy name aliases=]:
+
+	<table class=data>
+	<thead>
+		<tr><th>Alias	<th>Standard
+	<tbody>
+		<tr><td>-webkit-align-content<td>align-content
+		<tr><td>-webkit-align-items<td>align-items
+		<tr><td>-webkit-align-self<td>align-self
+		<tr><td>-webkit-flex<td>flex
+		<tr><td>-webkit-flex-basis<td>flex-basis
+		<tr><td>-webkit-flex-direction<td>flex-direction
+		<tr><td>-webkit-flex-flow<td>flex-flow
+		<tr><td>-webkit-flex-grow<td>flex-grow
+		<tr><td>-webkit-flex-shrink<td>flex-shrink
+		<tr><td>-webkit-flex-wrap<td>flex-wrap
+		<tr><td>-webkit-justify-content<td>justify-content
+		<tr><td>-webkit-order<td>order
+	</table>
+
 <h2 class="no-num" id="acknowledgments">Acknowledgments</h2>
 
 	<p>Thanks for feedback and contributions to
@@ -3655,6 +3686,11 @@ Changes since the <a href="https://www.w3.org/TR/2018/CR-css-flexbox-1-20181119/
 			Update aspect ratio terminology to use the term [=preferred aspect ratio=],
 			and clarify any uses that are specific to [=replaced elements=].
 
+		<li id="change-2018-collapsed-intrinsic-container">
+			Explicitly excluded [=collapsed flex items=]
+			from the [[#intrinsic-main-sizes|intrinsic main size calculations]].
+			(<a href="https://github.com/w3c/csswg-drafts/issues/5985">Issue 5985</a>)
+
 		<li id="change-2018-used-cross-size">
 			Clarified that the [=flex base size=] calculations
 			rely on the <em>used</em> [=cross size=].
@@ -3728,6 +3764,11 @@ Changes since the <a href="https://www.w3.org/TR/2018/CR-css-flexbox-1-20181119/
 		<li id="change-2018-content-based-editorial">
 			Redrafted the definition of [=content-based minimum size=]
 			for easier reading. (Editorial)
+
+		<li id="change-2018-webkit-aliases">
+			Added [[#webkit-aliases]] to document <code>-webkit-</code> aliases of flex layout properties
+			that are necessary for Web-compat.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/5634">Issue 5634</a>)
 	</ul>
 
 <h3 id="changes-20171016">