user guide: Update the ZY1000 description.

As per request from Peter at Ultimate Solutions, updated the
description of the ZY100 Stand-alone JTAG probe.

Signed-off-by: Bill Traynor <wmat@alphatroop.com>

Change-Id: Ia5c0b9a7261becd524a02aba1b22a98a2e09a4c9
Signed-off-by: William M.A. Traynor <wmat@alphatroop.com>
Reviewed-on: http://openocd.zylin.com/1357
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

doc/openocd.texi

@@ -321,13 +321,25 @@ Ethernet port needed?
 RTCK support? Also known as ``adaptive clocking''
 @end enumerate
 
-@section Stand alone Systems
+@section Stand-alone JTAG Probe
+
+The ZY1000 from Ultimate Solutions is technically not a dongle but a
+stand-alone JTAG probe that unlikemost dongles doesn’t require any drivers
+running on the developers host computer.
+Once installed on a network using DHCP or a static IP assignment, users can
+access the ZY1000 probe locally or remotely from any host with access to the
+IP address assigned to the probe.
+The ZY1000 provides an intuitive web interface with direct access to the
+OpenOCD debugger.
+Users may also run a GDBSERVER directly on the ZY1000 to take full advantage
+of GCC & GDB to debug any distribution of embedded Linux or NetBSD running on
+the target.
+The ZY1000 supports RTCK & RCLK or adaptive clocking and has a built-in relay
+to power cycle the target remotely.
+
+For more information, visit:
 
 @b{ZY1000} See: @url{http://www.ultsol.com/index.php/component/content/article/8/33-zylin-zy1000-jtag-probe}
-Technically, not a dongle, but a standalone box. The ZY1000 has the advantage that it does
-not require any drivers installed on the developer PC. It also has
-a built in web interface. It supports RTCK/RCLK or adaptive clocking
-and has a built in relay to power cycle targets remotely.
 
 @section USB FT2232 Based