[css-backgrounds-4] Add issue for border-parts.

Author: fantasai

css-backgrounds-4/Overview.bs

@@ -166,7 +166,14 @@ Partial borders</h2>
 
 	<p>CSS borders traditionally cover an entire border edge. Sometimes,
 	however, it can be useful to hide some parts of the border.
-	Here are two proposals for doing this.
+
+	<p class="issue">
+		Here are two proposals for doing this:
+		the second one is from GCPM, the first one is an attempt to recast it more readably.
+		The names are terrible, known problem, proposals accepted.
+		There is a problem with conceiving this as clipping:
+		if you have dotted borders, you want whole dots always, not parts of dots.
+		So it should be a drawing limit, not a clip.
 
 <h3 id="partial-borders">
 Partial Borders: the 'border-limit' property</h3>

css-backgrounds-4/Overview.html

@@ -243,7 +243,14 @@ <h2 class="heading settled heading" data-level=4 id=partial-borders0><span class
 
 	<p>CSS borders traditionally cover an entire border edge. Sometimes,
 	however, it can be useful to hide some parts of the border.
-	Here are two proposals for doing this.
+
+	<p class=issue id=issue-32661c58><a class=self-link href=#issue-32661c58></a>
+		Here are two proposals for doing this:
+		the second one is from GCPM, the first one is an attempt to recast it more readably.
+		The names are terrible, known problem, proposals accepted.
+		There is a problem with conceiving this as clipping:
+		if you have dotted borders, you want whole dots always, not parts of dots.
+		So it should be a drawing limit, not a clip.
 
 <h3 class="heading settled heading" data-level=4.1 id=partial-borders><span class=secno>4.1 </span><span class=content>
 Partial Borders: the <a class=property data-link-type=propdesc href=#propdef-border-limit title=border-limit>border-limit</a> property</span><a class=self-link href=#partial-borders></a></h3>
@@ -788,6 +795,14 @@ <h2 class="no-num heading settled" id=issues-index><span class=content>Issues In
 		Add a <span class=css data-link-type=maybe title=cubic-bezier()>cubic-bezier()</span> function for random other shapes?
 		Or some other functions?
 
-<a href=#issue-05846e60> ↵ </a></div><div class=issue>Should these properties be simplified to only accept <code>normal | [ &lt;length&gt; | &lt;percentage&gt; ] +</code>?
+<a href=#issue-05846e60> ↵ </a></div><div class=issue>
+		Here are two proposals for doing this:
+		the second one is from GCPM, the first one is an attempt to recast it more readably.
+		The names are terrible, known problem, proposals accepted.
+		There is a problem with conceiving this as clipping:
+		if you have dotted borders, you want whole dots always, not parts of dots.
+		So it should be a drawing limit, not a clip.
+
+<a href=#issue-32661c58> ↵ </a></div><div class=issue>Should these properties be simplified to only accept <code>normal | [ &lt;length&gt; | &lt;percentage&gt; ] +</code>?
 
 		<a href=#issue-14d9ac8f> ↵ </a></div></div>