update to synergy-1.8.8

Bug #5196 - Some keys on Korean and Japanese keyboards have the same keycode
Bug #5578 - Pressing Hangul key results in alt+'a'
Bug #5785 - Can't switch screens when cursor is in a corner
Bug #3197 - Linux: switchDoubleTap option is not working
Bug #4477 - Linux: Mouse buttons higher than id 10 result in crash
Bug #5832 - Linux: Screen size misdetected on multi-monitor display
Enhancement #4504 - Improved Korean language description
Enhancement #5525 - Added support for precise screen positioning in config file

(tnn)