config: fix compile warning on ubuntu + tidy tests
config: implement iterators and their tests
config: add kvs_conf_load() to libkvs.la
config: cmd/flux use kvs_conf_load ()
config: add kvs_conf_save() to libkvs
config: update flux-config for API changes
config: build flux-config again
config: flux: unset FLUX_CONFIG if using KVS
config: update t0001.t for flux-config changes
config: cmbd conditionally process config from KVS
config: build broker with libkvs