[css-fonts-4] linkfix & missing images

Author: svgeesus

css-fonts-4/Overview.bs

@@ -3584,7 +3584,7 @@ improve the speed of text rendering.</dd>
 For OpenType fonts,
 common ligatures are enabled by default.</dd>
 
-	<div class="featex"><img alt="common ligature example" src="liga.png"></div>
+	<div class="featex"><img alt="common ligature example" src="images/liga.png"></div>
 
 	<dt><dfn>no-common-ligatures</dfn>
 <dd>Disables display of common ligatures
@@ -3598,7 +3598,7 @@ so authors will need to refer to
 the documentation of a given font
 to understand which ligatures are considered discretionary.</dd>
 
-	<div class="featex"><img alt="discretionary ligature example" src="dlig.png"></div>
+	<div class="featex"><img alt="discretionary ligature example" src="images/dlig.png"></div>
 
 	<dt><dfn>no-discretionary-ligatures</dfn>
 <dd>Disables display of discretionary ligatures
@@ -3608,7 +3608,7 @@ to understand which ligatures are considered discretionary.</dd>
 <dd>Enables display of historical ligatures
 (OpenType feature: <span class="tag">hlig</span>).</dd>
 
-	<div class="featex"><img alt="historical ligature example" src="hlig.png"></div>
+	<div class="featex"><img alt="historical ligature example" src="images/hlig.png"></div>
 
 	<dt><dfn>no-historical-ligatures</dfn>
 <dd>Disables display of historical ligatures
@@ -3623,7 +3623,7 @@ to harmonize the shapes of glyphs with the surrounding context.
 For OpenType fonts,
 this feature is on by default.</dd>
 
-	<div class="featex"><img alt="contextual alternate example" src="calt.png"></div>
+	<div class="featex"><img alt="contextual alternate example" src="images/calt.png"></div>
 
 	<dt><dfn>no-contextual</dfn>
 <dd>Disables display of contextual alternates