Veyon 4.3.3

[tobydox]

We're happy to announce Veyon 4.3.3, the third maintenance release of Veyon 4.3.x:

• AuthKeys: overwrite files when exporting public or private key
• Linux: shutdown VNC server on session change more reliably
• Linux: update 3rdparty component x11vnc (non-critical build-related fixes)
• Linux: drop openSUSE 15.0 builds/packages
• Linux: provide packages for Fedora 30 instead of 29
• Linux: provide packages for CentOS 7.7 instead of 7.4
• Windows: sign all installers and program binaries with Authenticode code signing certificate
• Windows: improve service reliability
• Windows: make service start depend on network drivers and services
• Windows: modernize platform plugin code
• Windows: update libraries (Qt 5.12.8, OpenLDAP 2.4.49)
• Windows: update 3rdparty component UltraVNC (non-critical fixes)
• Windows: update DeskDupEngine DLLs to 1.2.3.0 RC
• Internal build system improvements
• Update translations