docs: Convert bare RFC 5988 URL to <rfc>8288</rfc> (Web Linking, supersedes 5988)

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1933858 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/manual/mod/mod_http2.xml b/docs/manual/mod/mod_http2.xml
index d979c22a31d9732e16707b90ce26e4f2f357c622..5d83e8cffb2b0925ba835262661b3dfb0c6d741b 100644 (file)
--- a/docs/manual/mod/mod_http2.xml
+++ b/docs/manual/mod/mod_http2.xml
@@ -265,8 +265,8 @@ H2Direct on
             </p>
             <p>
                 Server pushes are detected by inspecting the <code>Link</code> headers of
-                responses (see https://tools.ietf.org/html/rfc5988 for the 
-                specification). When a link thus specified has the <code>rel=preload</code>
+                responses (see <rfc>8288</rfc> for the
+                specification of Web Linking). When a link thus specified has the <code>rel=preload</code>
                 attribute, it is treated as a resource to be pushed.
             </p>
             <p>