Use the new RFC macros wherever RFCs are referenced by number.  No other
changes.
diff --git a/Doc/lib/libwww.tex b/Doc/lib/libwww.tex
index 8cfc09d..8b85d38 100644
--- a/Doc/lib/libwww.tex
+++ b/Doc/lib/libwww.tex
@@ -49,7 +49,7 @@
 --- Generic output formatter and device interface.
 
 \item[rfc822]
---- Parse RFC-822 style mail headers.
+--- Parse \rfc{822} style mail headers.
 
 \item[mimetools]
 --- Tools for parsing MIME style message bodies.
@@ -65,11 +65,11 @@
 representation
 
 \item[xdrlib]
---- The External Data Representation Standard as described in RFC 1014,
+--- The External Data Representation Standard as described in \rfc{1014},
 written by Sun Microsystems, Inc. June 1987.
 
 \item[mailcap]
---- Mailcap file handling.  See RFC 1524.
+--- Mailcap file handling.  See \rfc{1524}.
 
 \item[base64]
 --- Encode/decode binary files using the MIME base64 encoding.