Merge 'Fix zombie issue by using dumb-init ' into '1-3-stable'

Fix zombie issue by using dumb-init

Fix: #1081 (closed), #1167 (closed) and #1119 (closed)

Need some testing, but seems to work. I have only done a few builds yet, so need to do some more, before I can confirm it fix the issue.

See merge request !180 (merged)