Fix some Xr references:

- ada(4): ad(4) - removed, ada(4) would be a self-referencing entry
- cd(4): ad(4) -> ada(4)
- da(4): ad(4) -> ada(4)
- DEVICE_PROBE(9):  ugen(5) -> ugen(4)
- ed(4): dhclinet(8) -> dhclient(8) (typo)
- lmc(4): Netgraph(4) -> netgraph(4)
- security(7): rc.conf(8) -> rc.conf(5)
- sfxge(4): cpuset(8) -> cpuset(1)
- sbp(4): sysctl(1) -> sysctl(8)
- portindex(5): build(1) -> build(7)
- u3g(4): usbconfig(5) -> usbconfig(8)
- usb_quirk(4): usbconfig(5) -> usbconfig(8)

Found with:	textproc/igor
MFC after:	3 days

1 files changed, 3 insertions, 3 deletions

diff --git a/share/man/man4/u3g.4 b/share/man/man4/u3g.4
index 87e3824..d65c2c8 100644
--- a/share/man/man4/u3g.4
+++ b/share/man/man4/u3g.4
@@ -18,7 +18,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd November 20, 2011
+.Dd February 8, 2012
 .Dt U3G 4
 .Os
 .Sh NAME
@@ -88,7 +88,7 @@ driver is present which contains Windows and Mac OS X drivers.
 The device starts up in disk mode (TruInstall, ZeroCD, etc.) and requires
 additional commands to switch it to modem mode. If your device is not
 switching automatically, please try to add quirks. See
-.Xr usbconfig 5
+.Xr usbconfig 8
 and
 .Xr usb_quirk 4 .
 .Pp
@@ -97,7 +97,7 @@ and
 .Xr ucom 4 ,
 .Xr usb 4 ,
 .Xr usb_quirk 4 ,
-.Xr usbconfig 5
+.Xr usbconfig 8
 .Sh HISTORY
 The
 .Nm