Added documentation for the "smtpd" module.
Closes SF bug #450803.
diff --git a/Doc/lib/lib.tex b/Doc/lib/lib.tex
index 4fe4f01..8895b57 100644
--- a/Doc/lib/lib.tex
+++ b/Doc/lib/lib.tex
@@ -228,6 +228,7 @@
 \input{libimaplib}
 \input{libnntplib}
 \input{libsmtplib}
+\input{libsmtpd}
 \input{libtelnetlib}
 \input{liburlparse}
 \input{libsocksvr}