Merge changes from apertis/v2020-updates into apertis/v2020

debian/apertis/copyright.yml

+.*:
+  license: MIT
+.*Makefile.in:
+  license: FSFULLR
+hw/dmx/config/parser.c:
+  override-license: GPL-3+ WITH Bison-exception-2.2
+hw/dmx/config/parser.h:
+  override-license: GPL-3+ WITH Bison-exception-2.2
+hw/xwin/winprefsyacc.c:
+  override-license: GPL-3+ WITH Bison-exception-2.2
+hw/xwin/winprefsyacc.h:
+  override-license: GPL-3+ WITH Bison-exception-2.2