[dist] avoid warning on first boot of appliance
Warn admins about unconfigured distributions
[backend] Handle Build time marker in build log

Ignore the build time prefix while scanning the build log, e.g.

[34698s] /bin/sh: error while loading shared libraries: libgcc_s.so.1: cannot open shared object file: No such file or directory

Conflicts:
	src/backend/bs_worker