Log Message:
Update to synergy-1.8.6

Bug #5592 - Some keys don't work for macOS Sierra clients
Bug #5186 - Cursor stuck on client when using multi-DPI server
Bug #5722 - Malformed serial key in registry will crash GUI on startup
Bug #5752 - Tab order is incorrect on Settings dialog
Enhancement #5699 - Unified installers on macOS
Feature #4836 - macOS Sierra build
Bug #5680 - Server crashes when disconnecting SSL clients
Bug #5626 - Build fails using Xcode 8 and macOS SDK 10.12
Feature #5657 - Trial version support
Feature #5707 - User upgrade statistics