[css-fonts-4] Define src with <font-src-list>

css-fonts-4/Overview.bs

@@ -2440,7 +2440,7 @@ The <dfn id="at-font-face-rule">''@font-face''</dfn> rule</h3>
 
 	<pre class='descdef'>
 	Name: src
-	Value: see prose
+	Value: <<font-src-list>>
 	For: @font-face
 	Initial: N/A
 	</pre>
@@ -2469,12 +2469,9 @@ The <dfn id="at-font-face-rule">''@font-face''</dfn> rule</h3>
 
 <h4 id="font-face-src-parsing">Parsing the 'src!!descriptor' descriptor</h4>
 
-The 'src!!descriptor' descriptor value must be parsed
-according to section [[css-syntax#parse-comma-separated-list-of-component-values]].
-Then each component value is parsed according to this grammar:
+To parse a <dfn><<font-src-list>></dfn> production, [=parse a list=] of <<font-src>>s.
 
-
-<pre><<url>> [ format(<<font-format>>)]? [ tech( <<font-tech>>#)]? | local(<<family-name>>)</pre>
+<pre class="prod"><dfn>&lt;font-src></dfn> = <<url>> [ format(<<font-format>>)]? [ tech( <<font-tech>>#)]? | local(<<family-name>>)</pre>
 
 <pre class="prod"><dfn id="font-format-values">&lt;font-format&gt;</dfn>
 	 = [<<string>> | collection | embedded-opentype | opentype