document how to turn on YP

diff --git a/share/man/man5/passwd.5 b/share/man/man5/passwd.5
index 77dd659..181ce32 100644 (file)
--- a/share/man/man5/passwd.5
+++ b/share/man/man5/passwd.5
@@ -194,7 +194,21 @@ or
 entries contain text, it will override the information included via YP.
 On some systems, the
 .Ar passwd
-field may also be overriden.
+field may also be overriden, hence it is recommended that the standard
+way to turn YP passwd support in
+.Pa /etc/master.passwd
+is:
+.Pp
++:*::::::::
+.Pp
+which after
+.Xr pwd_mkdb 8
+will result in
+.Pa /etc/passwd
+containing:
+.Pp
++:*:0:0:::
+.Pp
 .Sh SEE ALSO
 .Xr chpass 1 ,
 .Xr login 1 ,