don't use .Lb, it doesn't work

--HG--
branch : HEAD
diff --git a/man/zip_fopen.mdoc b/man/zip_fopen.mdoc
index 48b1c54..441217c 100644
--- a/man/zip_fopen.mdoc
+++ b/man/zip_fopen.mdoc
@@ -1,4 +1,4 @@
-.\" $NiH$
+.\" $NiH: zip_fopen.mdoc,v 1.1 2003/10/03 11:19:03 dillo Exp $
 .\"
 .\" zip_fopen.mdoc -- open file in zip archvie for reading
 .\" Copyright (C) 2003 Dieter Baron and Thomas Klausner
@@ -39,7 +39,7 @@
 .Nm zip_fopen_index
 .Nd open file in zip archvie for reading
 .Sh LIBRARY
-.Lb libzip
+libzip (-lzip)
 .Sh SYNOPSIS
 .In zip.h
 .Ft struct zip_file *