[css-fonts-4][css-fonts-5] Update to current incremental keywords, fix #7665

Author: svgeesus

css-fonts-4/Overview.bs

@@ -2338,7 +2338,8 @@ Then each component value is parsed according to this grammar:
 
 <pre class="prod"><dfn id="font-tech-values">&lt;font-tech&gt;</dfn>
 	 = [<<font-features-tech>> | <<color-font-tech>>
-		| variations | palettes | incremental ]</pre>
+		| variations | palettes | 
+		  incremental-patch | incremental-range | incremental-auto ]</pre>
 
 <pre class="prod"><dfn id="font-features-tech-values">&lt;font-features-tech&gt;</dfn>
 	= [features-opentype | features-aat | features-graphite]</pre>
@@ -2401,7 +2402,7 @@ or font format.
 	for optimal performance.
 	Then,
 	for incremental transfer using the
-	<a href="https://www.w3.org/TR/2020/NOTE-PFE-evaluation-20201015/#range-request">range-request method</a>,
+	<a href="https://w3c.github.io/IFT/Overview.html#range-request-incxfer">range-request method</a>,
 	the raw uncompressed OpenType font is provided
 	so that the client
 	can perform byte range requests.
@@ -2410,7 +2411,7 @@ or font format.
 	@font-face {
 		font-family: "MyIncrementallyLoadedWebFont";
 		src: url("FallbackURLForBrowsersWhichDontSupportIncrementalLoading.woff2") format("woff2");
-		src: url("MyIncrementallyLoadedWebFont.otf") format(opentype)  tech(incremental);
+		src: url("MyIncrementallyLoadedWebFont.otf") format(opentype)  tech(incremental-range);
 	}
 	</pre>
 </div>
@@ -7577,9 +7578,13 @@ The System Font is the font which is used by the ''system-ui'' <a href="#system-
 	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/cpal">CPAL</a></code> table.
     The section on [[#color-font-support]] describes properties that interact with these facilities.
 
-	The 'incremental' tech refers to client support for
-	incremental font loading,
-	using either the range-request or the patch-subset method [[PFE-report]].
+	The 'incremental-patch', 'incremental-range' and 'incremental-auto' techs
+	refer to client support for incremental font transfer [[IFT]],
+	using the patch-subset, range-request, or 
+	<a href="https://w3c.github.io/IFT/Overview.html#opt-in">automatic negotiation</a> 
+	between these two methods.
+	
+	<p class="informative">For background on these, see [[PFE-report]].</p>
 
 	Web authors can specify the 'tech' function
 	inside an ''@font-face'' 'src!!descriptor' descriptor

css-fonts-5/Overview.bs

@@ -364,8 +364,9 @@ Then each component value is parsed according to this grammar:
 		| svg | truetype | woff | woff2 ]</pre>
 
 <pre class="prod"><dfn id="font-tech-values">&lt;font-tech&gt;</dfn>
-	 = [<<font-features-tech>> | <<color-font-tech>>
-		| variations | palettes | incremental ]</pre>
+	= [<<font-features-tech>> | <<color-font-tech>>
+		| variations | palettes | 
+			incremental-patch | incremental-range | incremental-auto ]</pre>
 
 <pre class="prod"><dfn id="font-features-tech-values">&lt;font-features-tech&gt;</dfn>
 	= [features-opentype | features-aat | features-graphite]</pre>
@@ -396,7 +397,7 @@ or font format.
 	for optimal performance.
 	Then,
 	for incremental transfer using the
-	<a href="https://www.w3.org/TR/2020/NOTE-PFE-evaluation-20201015/#range-request">range-request method</a>,
+	<a href="https://w3c.github.io/IFT/Overview.html#range-request-incxfer">range-request method</a>,
 	the raw uncompressed OpenType font is provided
 	so that the client
 	can perform byte range requests.
@@ -405,7 +406,7 @@ or font format.
 	@font-face {
 		font-family: "MyIncrementallyLoadedWebFont";
 		src: url("FallbackURLForBrowsersWhichDontSupportIncrementalLoading.woff2") format("woff2");
-		src: url("MyIncrementallyLoadedWebFont.otf") format(opentype)  tech(incremental);
+		src: url("MyIncrementallyLoadedWebFont.otf") format(opentype)  tech(incremental-range);
 	}
 	</pre>
 </div>