util-lib: split out allocation calls into alloc-util.[ch]
util-lib: move string table stuff into its own string-table.[ch]
util-lib: split out user/group/uid/gid calls into user-util.[ch]
sd-bus: when we get ENOTTY on the HELLO ioctl assume incompatible API version As perparation for future incompatible kdbus kernel API changes.
tree-wide: there is no ENOTSUP on linux Replace ENOTSUP by EOPNOTSUPP as this is what linux actually uses.
bus: add missing bus-policy.[ch] Accidentally forgot to commit this. Sorry!