Import upstream v214-stable patch series and rebase remaining Debian patches.
Update symbols files.
attempt parallel build
explicitely disable microhttpd
Fix build of the insserv generator
Various patches and tweaks for the sysv generator

Added post-214 patches from upstream and add a new patch to add rcS.d
services to sysinit.target.wants
Add TODO items to the changelog
Add more TODO items to the changelog