mapping Meta+Backspace to mac Cmd+Backspace on http://synergy-foss.org/

synergy.conf

section: screens
	osx.lan:
		halfDuplexCapsLock = false
		halfDuplexNumLock = false
		halfDuplexScrollLock = false
		xtestIsXineramaUnaware = false
		switchCorners = none 
		switchCornerSize = 0
	ubuntu:
		halfDuplexCapsLock = false
		halfDuplexNumLock = false
		halfDuplexScrollLock = false
		xtestIsXineramaUnaware = false
		switchCorners = none 
		switchCornerSize = 0
end

section: aliases
end

section: links
	osx.lan:
		right = ubuntu
	ubuntu:
		left = osx.lan
end

section: options
	relativeMouseMoves = false
	screenSaverSync = true
	win32KeepForeground = false
	switchCorners = none 
	switchCornerSize = 0
	keystroke(Meta+BackSpace) = ;keystroke(Control+BackSpace,osx.lan)
end