* modularize cgroups and cmake; #4339
* modularized freeipmi.plugin
* added comment about referencing parent files
* modularized apps.plugin
* modularized proc and diskspace
* minor fixes
* modularized plugins: checks, freebsd, idlejitter, nfacct, tc, macos, plugins.d
* minor fixes 2
* modularized statsd
* modularized cgroup-network
* moved cgroup-network-helper.sh and cgroup-name.sh to cgroup.plugin
* modularized health plugin
* move rrd related info to rrd.h
* added libnetdata
* do not corrupt config.h
* use dir-objects instead of static libraries
* fixed cmake for new structure
* use absolute paths to fix LGTM
* enable automake subdir-objects and prettify its output
* use relative files at the src directory for all plugins
* fix compiler warning
* synced automake and cmake
* added config.h to cmake
* abstracted basic os functions in libnetdata/os
* fix zfs_common
* removed apps.plugin dependency on freebsd plugin
* health removed from plugins
* modularized the registry
* modularized the rest of it
* include streaming files in cmake
* use libnetdata as library
* enable silent-rules only when they are available