Update collectd to version 5.9.0

* remove backported upstream patches (sensors, modbus)
* remove lua patch that has been been implemented upstream
  (See collectd PR 3144)
* refresh patches and accommodate into upstream path changes
* place the 'stations' datatype for iwinfo in alpbetically
  correct place in types.db
* add libmnl dependency to 'processes' plugin required for the
  new Linux process Delay Accounting capability.
  (Alternatively the capability & requirement might be patched away
   in Makefile.am, HAVE_LIBTASKSTATS from collectd_4ea7a572)

* new plugins (disabled): ampq1, gpu_nvidia, pcie_errors,
                          write_stackdriver, write_syslog

compile-tested: ar71xx/WNDR3700 (all plugins)
run-tested: ar71xx/WNDR3700 (selected plugins)

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

This patch upgrades the collectd package from 5.7.2 to 5.8.2.
All openwrt patches got either updated or deleted in case they
are already included into upstream collectd.
The new collectd 5.8.0 package compiles and got tested on current
lede trunk with latest luci on an PCengines APU. All default plugins
(enabled via Openwrt  Makefile) - so also iwinfo - are running fine
with the new version.

Signed-off-by: Thomas Huehn <thomas@net.t-labs.tu-berlin.de>

Amended with the following changes:

* preserve git file history by avoiding unnecessary patch renames
* mark new plugins introduced with 5.8 branch as disabled

Compile tested all plugins with ipq806x

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

Update collectd to version 5.7.1

* replace 003-remove-werror.patch with configure option
* remove 200-fix-git-describe-error.patch that is now unnecessary
* reformat other patches due to whitespace changes
* add new plugins to the list as disabled

* correct download & homepage links
* add myself as the second maintainer

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

Update collectd, the backbone of Luci statistics, to 5.5.1

Refresh patches. Main changes:
 - Remove 500-upstream-parallel-build-fix.patch (implemented upstream)
 - Add 600-fix-libmodbus-detection.patch to revert an upstream change
   that broke libmodbus detection in collectd's configure script

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

Some collectd plugins launch third-party plugins that have variation in
initialisation time (like libpcap). Recently (since kernel bump to 4.1)
the DNS plugin has been causing collectd to crash semi-randomly at startup
on MIPS based WNDR3700.

Debugging led to realisation that the DNS plugin seems to require at least
0.1s time to start, before the first data reading attempt starts.

By default, the first data read cycle starts immediately, while apaprently
some of the plugins may still be asyncronously initialising. To make things
safe, this patch adds 1 second delay before the first data read cycle.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>