modularized all source code (#4391)

* modularized all external plugins

* added README.md in plugins

* fixed title

* fixed typo

* relative link to external plugins

* external plugins configuration README

* added plugins link

* remove plugins link

* plugin names are links

* added links to external plugins

* removed unecessary spacing

* list to table

* added language

* fixed typo

* list to table on internal plugins

* added more documentation to internal plugins

* moved python, node, and bash code and configs into the external plugins

* added statsd README

* fix bug with corrupting config.h every 2nd compilation

* moved all config files together with their code

* more documentation

* diskspace info

* fixed broken links in apps.plugin

* added backends docs

* updated plugins readme

* move nc-backend.sh to backends

* created daemon directory

* moved all code outside src/

* fixed readme identation

* renamed plugins.d.plugin to plugins.d

* updated readme

* removed linux- from linux plugins

* updated readme

* updated readme

* updated readme

* updated readme

* updated readme

* updated readme

* fixed README.md links

* fixed netdata tree links

* updated codacy, codeclimate and lgtm excluded paths

* update CMakeLists.txt

* updated automake options at top directory

* libnetdata slit into directories

* updated READMEs

* updated READMEs

* updated ARL docs

* updated ARL docs

* moved /plugins to /collectors

* moved all external plugins outside plugins.d

* updated codacy, codeclimate, lgtm

* updated README

* updated url

* updated readme

* updated readme

* updated readme

* updated readme

* moved api and web into webserver

* web/api web/gui web/server

* modularized webserver

* removed web/gui/version.txt

1 files changed, 62 insertions, 0 deletions

diff --git a/registry/registry_person.h b/registry/registry_person.h
new file mode 100644
index 0000000000..30e9cb5139
--- /dev/null
+++ b/registry/registry_person.h
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_REGISTRY_PERSON_H
+#define NETDATA_REGISTRY_PERSON_H 1
+
+#include "registry_internals.h"
+
+// ----------------------------------------------------------------------------
+// PERSON structures
+
+// for each PERSON-URL pair we keep this
+struct registry_person_url {
+    avl avl;                    // binary tree node
+
+    REGISTRY_URL *url;          // de-duplicated URL
+    REGISTRY_MACHINE *machine;  // link the MACHINE of this URL
+
+    uint8_t flags;
+
+    uint32_t first_t;           // the first time we saw this
+    uint32_t last_t;            // the last time we saw this
+    uint32_t usages;            // how many times this has been accessed
+
+    char machine_name[1];       // the name of the machine, as known by the user
+    // dynamically allocated to fit properly
+};
+typedef struct registry_person_url REGISTRY_PERSON_URL;
+
+// A person
+struct registry_person {
+    char guid[GUID_LEN + 1];    // the person GUID
+
+    avl_tree person_urls;       // dictionary of PERSON_URLs
+
+    uint32_t first_t;           // the first time we saw this
+    uint32_t last_t;            // the last time we saw this
+    uint32_t usages;            // how many times this has been accessed
+
+    //uint32_t flags;
+    //char *email;
+};
+typedef struct registry_person REGISTRY_PERSON;
+
+// PERSON_URL
+extern REGISTRY_PERSON_URL *registry_person_url_index_find(REGISTRY_PERSON *p, const char *url);
+extern REGISTRY_PERSON_URL *registry_person_url_index_add(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) NEVERNULL WARNUNUSED;
+extern REGISTRY_PERSON_URL *registry_person_url_index_del(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) WARNUNUSED;
+
+extern REGISTRY_PERSON_URL *registry_person_url_allocate(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, REGISTRY_URL *u, char *name, size_t namelen, time_t when);
+extern REGISTRY_PERSON_URL *registry_person_url_reallocate(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, REGISTRY_URL *u, char *name, size_t namelen, time_t when, REGISTRY_PERSON_URL *pu);
+
+// PERSON
+extern REGISTRY_PERSON *registry_person_find(const char *person_guid);
+extern REGISTRY_PERSON *registry_person_allocate(const char *person_guid, time_t when);
+extern REGISTRY_PERSON *registry_person_get(const char *person_guid, time_t when);
+extern void registry_person_del(REGISTRY_PERSON *p);
+
+// LINKING PERSON -> PERSON_URL
+extern REGISTRY_PERSON_URL *registry_person_link_to_url(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, REGISTRY_URL *u, char *name, size_t namelen, time_t when);
+extern void registry_person_unlink_from_url(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu);
+
+#endif //NETDATA_REGISTRY_PERSON_H