Add a man page for usb_quirk module, plus references in other man pages,

and updated comments in the usb_quirk.h header file.

The main purpose of this is to expose the quirks for ejecting 3G
modules. usb_modeswitch in Linux does a great job of collecting
information on these, and with the quirks module people can try out the
modeswitch config file entries on FreeBSD, hence the SCSI strings in the
man page.

MFC after:	2 weeks

1 files changed, 9 insertions, 16 deletions

diff --git a/share/man/man4/u3g.4 b/share/man/man4/u3g.4
index eb192f9..d012353 100644
--- a/share/man/man4/u3g.4
+++ b/share/man/man4/u3g.4
@@ -85,26 +85,19 @@ In some of these devices a mass storage device supported by the
 .Xr umass 4
 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.
+additional commands to switch it to modem mode. If your device is not
+switching automatically, please try to add quirks. See
+.Xr usbconfig 5
+and
+.Xr usb_quirk 4 .
 .Pp
-The
-.Xr u3gstub 4
-device will attach temporarily to a 3G device with a mass storage device and
-force it to switch to modem mode.
-The attach and detach of
-.Xr u3gstub
-and any driver disk device present on the 3G device is hidden, unless the
-machine was booted in verbose mode (see
-.Xr boot 8 ) .
-To temporarily unhide the device, set
-.Va debug.bootverbose
-to 1 using
-.Xr sysctl 8
-and replug the device.
 .Sh SEE ALSO
 .Xr tty 4 ,
 .Xr ucom 4 ,
-.Xr usb 4
+.XR u3g 4 ,
+.Xr usb 4 ,
+.Xr usb_quirk 4 ,
+.Xr usbconfig 5
 .Sh HISTORY
 The
 .Nm