make the close window action configurable

[Antoine Martin]

Some users may not want the close window action to be forwarded to the server. Provide a way to configure the action and continue to default to forwarding it.

[Antoine Martin]

Implemented in r11798, this adds a new window-close option with the following 4 possible values:

• forward (same as before)
• ignore
• disconnect
• shutdown

See man page for more details.

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@afarr: this is just a FYI, please close as ACK, unless you feel like testing it.

[J. Max Mena]

Verified all options work. All good. Closing as acknowledged.

Side note: --window-close=blah is a client side option.

[Antoine Martin]

Since the default config included an "auto" mode, it was almost easier to actually implement it rather than take it out: r11971 allows us to disconnect by default instead of closing "Xnest" and "Xephyr" windows. This makes us behave more like VNC clients.

[J. Max Mena]

Huh. Looks like I failed to actually close the ticket. Closing!

(I have a feeling the "shutdown" option will come in handy for us)

[Antoine Martin]

Minor fixes in r12696