Adding upstream version 1.37.1.upstream/1.37.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+<!--
+title: "Dovecot monitoring with Netdata"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/python.d.plugin/dovecot/README.md
+sidebar_label: "Dovecot"
+-->
+
+# Dovecot monitoring with Netdata
+
+Provides statistics information from Dovecot server.
+
+Statistics are taken from dovecot socket by executing `EXPORT global` command.
+More information about dovecot stats can be found on [project wiki page.](http://wiki2.dovecot.org/Statistics)
+
+Module isn't compatible with new statistic api (v2.3), but you are still able to use the module with Dovecot v2.3
+by following [upgrading steps.](https://wiki2.dovecot.org/Upgrading/2.3).
+
+**Requirement:**
+Dovecot UNIX socket with R/W permissions for user `netdata` or Dovecot with configured TCP/IP socket.
+
+Module gives information with following charts:
+
+1.  **sessions**
+
+    -   active sessions
+
+2.  **logins**
+
+    -   logins
+
+3.  **commands** - number of IMAP commands
+
+    -   commands
+
+4.  **Faults**
+
+    -   minor
+    -   major
+
+5.  **Context Switches**
+
+    -   voluntary
+    -   involuntary
+
+6.  **disk** in bytes/s
+
+    -   read
+    -   write
+
+7.  **bytes** in bytes/s
+
+    -   read
+    -   write
+
+8.  **number of syscalls** in syscalls/s
+
+    -   read
+    -   write
+
+9.  **lookups** - number of lookups per second
+
+    -   path
+    -   attr
+
+10. **hits** - number of cache hits
+
+    -   hits
+
+11. **attempts** - authorization attempts
+
+    -   success
+    -   failure
+
+12. **cache** - cached authorization hits
+
+    -   hit
+    -   miss
+
+## Configuration
+
+Edit the `python.d/dovecot.conf` configuration file using `edit-config` from the Netdata [config
+directory](/docs/configure/nodes.md), which is typically at `/etc/netdata`.
+
+```bash
+cd /etc/netdata   # Replace this path with your Netdata config directory, if different
+sudo ./edit-config python.d/dovecot.conf
+```
+
+Sample:
+
+```yaml
+localtcpip:
+  name     : 'local'
+  host     : '127.0.0.1'
+  port     : 24242
+
+localsocket:
+  name     : 'local'
+  socket   : '/var/run/dovecot/stats'
+```
+
+If no configuration is given, module will attempt to connect to dovecot using unix socket localized in `/var/run/dovecot/stats`
+
+---
+
+