Clarify component percent-encode set is good for opaque hosts

url.bs

@@ -205,7 +205,7 @@ U+0024 ($) to U+0026 (&), inclusive, U+002B (+), and U+002C (,).
 <p class=note>This is used by <cite>HTML</cite> for
 {{NavigatorContentUtils/registerProtocolHandler()}}, and could also be used by other standards to
 percent-encode data that can then be embedded in a <a for=/>URL</a>'s <a for=url>path</a>,
-<a for=url>query</a>, or <a for=url>fragment</a>. Using it with
+<a for=url>query</a>, or <a for=url>fragment</a>; or in an <a for=/>opaque host</a>. Using it with
 <a for=string>UTF-8 percent-encode</a> gives identical results to JavaScript's
 <a method><code>encodeURIComponent()</code> [sic]</a>. [[HTML]] [[ECMA-262]]
 
@@ -3439,6 +3439,7 @@ Jeffrey Yasskin,
 Joe Duarte,
 Joshua Bell,
 Jxck,
+Karl Wagner,
 田村健人 (Kent TAMURA),
 Kevin Grandon,
 Kornel Lesiński,