Adjusted to use the new module synopsis support macros.
diff --git a/Doc/lib/libsmtplib.tex b/Doc/lib/libsmtplib.tex
index d67578a..699eb10 100644
--- a/Doc/lib/libsmtplib.tex
+++ b/Doc/lib/libsmtplib.tex
@@ -1,7 +1,9 @@
 % Documentation by ESR
 \section{Standard Module \module{smtplib}}
-\stmodindex{smtplib}
-\label{module-smtplib}
+\declaremodule{standard}{smtplib}
+
+\modulesynopsis{SMTP protocol client (requires sockets).}
+
 \indexii{SMTP}{protocol}
 \index{Simple Mail Transfer Protocol}