doc: mention <link> can be inside of <command>, but not <xref>

bmomjian · bmomjian · commit 84f15ccd4c25 · 2021-04-22T16:01:17.000-04:00
This was discussed in commit 9081bdd. Reported-by: Peter Eisentraut Discussion: https://postgr.es/m/flat/87o8pco34z.fsf@wibble.ilmari.org
diff --git a/doc/src/sgml/README.links b/doc/src/sgml/README.links
@@ -22,6 +22,7 @@ endterm=
 <link>
 	use to supply text for the link, only uses linkend, requires </link>
 	http://www.oasis-open.org/docbook/documentation/reference/html/link.html
+	can be embedded inside of <command>, unlike <xref>
 
 
 External Linking
