• Filesystem: close all handles when switching to other game directory
• Sound: fixed potential division-by-zero in S_GetSoundTime() in case of failed DirectSound initialization, reworked shutdown functions
• Unix: output only printable chars in console
• SDL: removed archive flag for \in_nograb
• QVM: added more optimizations, removed unsafe x86 optimizations with disabled VM_RTCHECK_DATA
• QVM: always force either range checks or data mask operations