minor edits to intro; link to ABNF rfc

Author: miketaylr

index.html

@@ -12,7 +12,7 @@
     github: "https://github.com/w3c/network-error-logging/",
     shortname: "network-error-logging",
     specStatus: "ED",
-    xref: ["network-reporting", "fetch", "hr-time", "html", "mixed-content", "referrer-policy", "reporting", "resource-timing", "secure-contexts", "url"],
+    xref: ["network-reporting", "fetch", "hr-time", "html", "infra", "mixed-content", "referrer-policy", "reporting", "resource-timing", "secure-contexts", "url"],
     editors: [{
       name: "Douglas Creager",
       url: "https://dcreager.net/",
@@ -117,7 +117,8 @@ <h2>Network requests</h2>
 
       <p>
       A <dfn data-lt="network requests">network request</dfn> occurs when the
-      user agent must use the network to service a single [=request=].
+      [=user agent=] attempts to [=fetch=] a resource over the network for a
+      given [=request=].
       </p>
 
       <p>
@@ -404,7 +405,7 @@ <h2><code>NEL</code> response header</h2>
       <p>
       The <dfn><code>NEL</code></dfn> <a>response header</a> is used to
       communicate an <a>origin</a>'s <a>NEL policy</a> to the user agent.  The
-      ABNF (Augmented Backus-Naur Form) syntax for the <a>NEL</a> header is as
+      ABNF (Augmented Backus-Naur Form) [[RFC5234]] syntax for the <a>NEL</a> header is as
       follows:
       </p>