x2xs, the new x2x that can control multiple X servers

[zhangweiwu]

It would be nice to have a new executable x2xs:

x2xs [-east <DISPLAY>] [-west <DISPLAY>] [-north <DISPLAY>] [-south <DISPLAY>]

This gives x2xs the possibility to control more than one X server, when user move mouse beyond north border, pass control to the X server defined in "-north <DISPLAY>". So does south, west and east. Richer command set can be added to allow more ways to control multiple X servers.

x2x will become a simple application that calls x2xs with correct parameter. e.g. 'x2x -north joe.realss.com:11.0' would in fact invoke 'x2xs -north joe.realss.com:11.0'. x2x exists for compatibility reason.