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 to 5.5.3

Release notes at https://github.com/collectd/collectd/releases/tag/collectd-5.5.3

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

* Bump collectd version to 5.5.2.
* Refresh patches.

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>