[css-break-4] Sync with L3

Author: fantasai

css-break-4/Overview.bs

@@ -617,7 +617,7 @@ Types of Breaks</h3>
 		[[!CSS3-REGIONS]]
 	</dl>
 
-	Note: A fifth type of break is the <dfn>line break</dfn>,
+	Note: A fifth type of break is the [=line break=],
 	which is a break between two <a href="https://www.w3.org/TR/CSS2/visuren.html#line-box">line boxes</a>.
 	These are not covered in this specification; see [[!CSS2]] [[CSS-TEXT-3]].
 
@@ -1233,6 +1233,11 @@ Transforms, Positioning, and Pagination</h3>
 	are not required to correctly position absolutely-positioned elements
 	that end up on a previously-rendered page.
 
+<h2 class="no-num" id="priv-sec">
+Privacy and Security Considerations</h2>
+
+This specification introduces no new privacy or security considerations over CSS in general.
+
 <h2 class="no-num" id="changes">
 Changes</h2>