further improvement of maintenance scripts

code/archives.json

@@ -566,6 +566,7 @@
   "https://github.com/dmecke/OpenSoccerStar.git",
   "https://github.com/dogballs/cattle-bity.git",
   "https://github.com/dorkster/freeblocks.git",
+  "https://github.com/dougmencken/HeadOverHeels.git",
   "https://github.com/doxygen/doxygen.git",
   "https://github.com/dreamchess/dreamchess.git",
   "https://github.com/dsallen7/ransack-python.git",
@@ -666,6 +667,7 @@
   "https://github.com/ihofmann/open-websoccer.git",
   "https://github.com/indyjo/Thunder-Lightning.git",
   "https://github.com/inexorgame/inexor-core.git",
+  "https://github.com/inexorgame/vulkan-renderer.git",
   "https://github.com/infidel-/cult.git",
   "https://github.com/inolen/quakejs.git",
   "https://github.com/instead-hub/instead.git",