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

2 files changed, 102 insertions, 1 deletions

diff --git a/system/Makefile.am b/system/Makefile.am
index 9300583b85..eca8c565b9 100644
--- a/system/Makefile.am
+++ b/system/Makefile.am
@@ -4,6 +4,7 @@
 #
 MAINTAINERCLEANFILES= $(srcdir)/Makefile.in
 CLEANFILES = \
+    edit-config \
 	netdata-openrc \
 	netdata.logrotate \
 	netdata.service \
@@ -14,10 +15,14 @@ CLEANFILES = \
 	$(NULL)
 
 include $(top_srcdir)/build/subst.inc
-
 SUFFIXES = .in
 
+dist_config_SCRIPTS = \
+    edit-config \
+    $(NULL)
+
 nodist_noinst_DATA = \
+    edit-config.in \
 	netdata-openrc \
 	netdata.logrotate \
 	netdata.service \
diff --git a/system/edit-config.in b/system/edit-config.in
new file mode 100755
index 0000000000..1b86549fa4
--- /dev/null
+++ b/system/edit-config.in
@@ -0,0 +1,96 @@
+#!/usr/bin/env sh
+
+[ -f /etc/profile ] && . /etc/profile
+
+file="${1}"
+
+EDITOR="${EDITOR-vi}"
+[ -z "${NETDATA_USER_CONFIG_DIR}"  ] && NETDATA_USER_CONFIG_DIR="@configdir_POST@"
+[ -z "${NETDATA_STOCK_CONFIG_DIR}" ] && NETDATA_STOCK_CONFIG_DIR="@libconfigdir_POST@"
+
+if [ -z "${file}" ]
+then
+	cat <<USAGE
+
+USAGE:
+  ${0} FILENAME
+
+  Copy and edit the stock config file named: FILENAME
+  if FILENAME is already copied, it will be edited as-is.
+
+  The EDITOR shell variable is used to define the editor to be used.
+
+  Stock config files at: '${NETDATA_STOCK_CONFIG_DIR}'
+  User  config files at: '${NETDATA_USER_CONFIG_DIR}'
+
+  Available files in '${NETDATA_STOCK_CONFIG_DIR}' to copy and edit:
+
+USAGE
+
+	cd "${NETDATA_STOCK_CONFIG_DIR}" || exit 1
+	ls >&2 -R *.conf */*.conf
+	exit 1
+
+fi
+
+file_is_in_path() {
+	local file path real
+	file="${1}"
+	path="${2}"
+	
+	real="$(readlink -f "${file}")"
+
+	# we don't have working readlink
+	[ -z "${real}" ] && return 0
+
+	if [ ! -z "${real}" ] && [ -z "$(echo "${real}" | grep -E "^${path}.*$")" ]
+	then
+		echo >&2 "File '${file}' is physically at '${real}', which is not in '${path}'. Aborting."
+		exit 1
+	fi
+
+	return 0
+}
+
+edit() {
+	echo >&2 "Editing '${1}' ..."
+
+	# check we can edit
+	file_is_in_path "${1}" "${NETDATA_USER_CONFIG_DIR}" || exit 1
+
+	"${EDITOR}" "${1}"
+	exit $?
+}
+
+copy_and_edit() {
+	# check we can copy
+	file_is_in_path "${NETDATA_STOCK_CONFIG_DIR}/${1}" "${NETDATA_STOCK_CONFIG_DIR}" || exit 1
+
+	if [ ! -f "${NETDATA_USER_CONFIG_DIR}/${1}" ]
+	then
+		echo >&2 "Copying '${NETDATA_STOCK_CONFIG_DIR}/${1}' to '${NETDATA_USER_CONFIG_DIR}/${1}' ... "
+		cp -p "${NETDATA_STOCK_CONFIG_DIR}/${1}" "${NETDATA_USER_CONFIG_DIR}/${1}" || exit 1
+	fi
+
+	edit "${NETDATA_USER_CONFIG_DIR}/${1}"
+}
+
+# make sure it is not absolute filename
+c1="$(echo "${file}" | cut -b 1)"
+if [ "${c1}" = "/" ] || [ "${c1}" = "." ]
+then
+	echo >&2 "Please don't use filenames starting with '/' or '.'"
+	exit 1
+fi
+
+# already exists
+if [ -f "${NETDATA_USER_CONFIG_DIR}/${file}" ]
+then
+	edit "${NETDATA_USER_CONFIG_DIR}/${file}"
+fi
+
+[ -f "${NETDATA_USER_CONFIG_DIR}/${file}"  ] && edit "${NETDATA_USER_CONFIG_DIR}/${file}"
+[ -f "${NETDATA_STOCK_CONFIG_DIR}/${file}" ] && copy_and_edit "${file}"
+
+echo >&2 "File '${file}' is not found in '${NETDATA_STOCK_CONFIG_DIR}'"
+exit 1