Bump version to 5.3.1; Update ChangeLog.
lpar: make dots in configure.in consistent with other plugins
rrdcached, rrdtool plugins: Honor the "DataDir" setting.

This fixes a regression introduced in:
bfd3f06ef4996707036756371c5724ebf2748821

Github: #380
rrdcached, rrdtool plugins: Add directory separator after datadir.

D'oh! Thanks to @rcpoison for pointing this out!

Github: #380
aquaero: Include aquaero plugin in config files.

Adds the aquaero plugin into the build system.
aquaero: New Aquaero sensors plugin

This plugin adds support for the Aquaero 5 sensors.
csv plugin: fix forgotten "datadir" in re-implement value_list_to_filename()

In the commit 7f90e30 the re-implementation of value_list_to_filename
forgot to prepend the datadir string.

Signed-off-by: Florian Forster <octo@collectd.org>
csv plugin: set datadir null when free

If you define twice DataDir:

    <Plugin csv>
	DataDir "/opt/collectd/var/lib/collectd/csv"
	DataDir stdout
    </Plugin>

the second time datadir will not be null and
you will get garbage in value_list_to_filename

Signed-off-by: Florian Forster <octo@collectd.org>
curl_json plugin: separate the cj_curl_perform in to the curl and yajl parts
curl_json plugin: support getting json from a Unix socket as well as a URL
memcached plugin: actually connect when using a unix socket

Signed-off-by: Florian Forster <octo@collectd.org>
curl_json plugin: use sstrerr for thread safety
curl_json plugin: style cleanups
Merge branch 'pr/392'
curl_json plugin: support arrays

Allow access to data in JSON arrays.  For example

    { workers: [ { requests: 10 }, { requests: 10 } ] }

can all be accessed with

    workers/*/requests

or just one by using the index.

    workers/1/requests
curl_json plugin: document being able to access arrays
curl_json plugin: separate the cj_curl_perform in to the curl and yajl parts
curl_json plugin: support getting json from a Unix socket as well as a URL
curl_json plugin: use sstrerr for thread safety
curl_json plugin: style cleanups