#253 Choose the 2 joysticks to use (from many)

[ojde]

This patch enables those users which have more than 2 usb game controllers attached to choose which two game controllers DOSBox should use as "first" and "second" joystick.

It adds two keys to the [joystick] section: idjoystickone(=integer) and idjoysticktwo(=integer). Their default values are 1 and 2 respectivly. Setting idjoystickone=4 and idjoysticktwo=3, for example, will result in DOSBox using joystick 4 as "first" and joystick 3 as "second": The mechanisms of all joysticktype-settings stay the same, but they are now applied to 4 and 3 instead to 1 and 2.

[ojde]

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