procd: jail: clean up capability handling and non-root ubusd
Unify capability handling to only use OCI spec parsers even for ujail
slim containers which previously supposedly used their own format.
80c9516 cgroups: restrict allowed keys in 'unified' section
5ade567 cgroups: memory controller fixes
3121467 early: run ubusd non-root as user ubus, group ubus
12a5b97 jail: adapt to new ubus socket path
788d144 instance: actually wire up capabilities filename
ebc5a7f jail: nuke old capabilities code in favour of reusing OCI code
6c5233a jail: capabilities: apply in two phases
Signed-off-by: Daniel Golle <daniel@makrotopia.org>