[CNS] fix api.lua to correctly report "HTTP/1.1 500 Internal Server Error" (#299)
[CNS] accept HTTP/1.x 404, 200, 304 when polling registry (#469)
[VCT] Remove deprecated _EXP_DATA_EXTENSIONS (#446)
Merge branch 'testing' into feature234

Conflicts:
	utils/vct/server/vct/admin.py
[CNS] node.lua minior cleanup
[CNS] rules.lua: minor fix of cb2_set_table() dbg
[CNS] system.lua: critical fix of set_system_conf() and opt=disk_max_per_sliver
[CNS] support slice/sliver resource limits (#46)