See this thread for reasoning and acceptance from contributors: https://groups.google.com/d/topic/qubes-devel/G7KzrfU0lWY/discussion "Changing qubes-core-admin license to LGPL v2.1+"
'dispvm_allowed' name was confusing, because it suggested being able to spawn new DispVMs, not being a template for DispVM. Fixes QubesOS/qubes-issues#3047