Munin contributed plugins

Merge pull request #956 from kael-shipman/logevents

Added loggrepx_ and service_events

Addressed PR suggestions (round 1)

Merge pull request #955 from kael-shipman/patch-1

Added print_{warning,critical} for greater flexibility

Accepted suggestion from maintainer

Merge pull request #953 from Slamdunk/patch-1

Nginx error: log files may be empty

Merge pull request #952 from Neraud/debsecan

Improve documentation of debsecan_ plugin and add example graphs

Fixed example graphs file names
Renamed from debsecan_pkg-FOO.png to debsecan_-FOO.png

Fixed CONFIGURATION documentation

Add a plugin for unifi (Ubiquity) gear

Plugins available:

• unifi_api - Providing the following graphs:
  • unifi_clients_by_device - Count the number of clients connected on a per-device basis
  • unifi_clients_by_network - Count the number of clients connected to each named network...

Generate cache file if missing

Don't exit with error if cache file is missing, instead refrain from sending values and daemonize() in an attempt to generate one.
Invocation using 'config' before generation is successful will fail, as mentioned in #914, but configuration will get picked up as soon as it is present.

Add sort to the du command to keep things in order of size

Plugins tc_*: check existence of "tc" during autoconf

Restructure incomplete or broken "autoconf" implementations

Some plugins with non-zero autoconf exitcodes (it must be zero instead)
deserved a bit of code cleanup for improved readability.

Improve incorrect or unspecific output for "autoconf"

Some plugins emit wrongly formatted "no" messages or lack the "yes"
message on success.

Merge pull request #940 from RubenKelevra/add_systemd_net_for_tc

network.tc*: add the ability to detect systemd based network devices

Merge pull request #938 from Neraud/git_commit_behind_fixed_shell

Git commit behind fixed shell

Plugins jstat__*: add format examples

Plugins jstat__*: add support for Java 1.8

Plugins jstat__*: mention 'graphtitle' setting in documentation

Plugins jstat__*: simplify handling of environment settings

Plugin ceph_osd: improve style and documentation

Plugin asterisk: fix typos for "unknown" dataset

The "draw" configuration as well as the "value" were ignored.

Fixed error when using a user which doesn't have a default shell (like the default munin user on Debian/Ubuntu)

Added example graphs

Changed the graph_category to file_transfer

Fixed NOTES comment to better explain the fetch munin/cron modes

Merge pull request #929 from sumpfralle/plugin-postfix-rbl-blocked-mails

Plugin postfix-rbl-blocked-mails: various improvements

Improved munin state file handling

Improved how the statefile last modified date is updated

Misc code improvements

Plugin postfix-rbl-blocked-mails: count by top-level-domain

It looks like the spamhaus domain changed from sbl-xbl.spamhaus.org to
zen.spamhaus.org. The same may have happened for other RBL domains.
Thus we just filter by the top level domain (instead of the specific...

Plugin postfix-rbl-blocked-mails: unify whitespace

Whitespace cleanup

• remove trailing whitespace
• remove empty lines at the end of files

Plugin cpu-usage-by-process: fix autoconf output

Plugin proftpd_count: fix shellcheck issues

Plugin proftpd_count: fix autoconf handling

Review and unify category assignments of plugins

Plugins xen_*: fix 'autoconf' logic and exitcode

Plugin virtualbox_*: fix shellcheck issues

Plugin radwho_cnt: fix shellcheck issues

Move 'qstatcod4and5_' to quake directory

Move munin-related plugins to 'munin' directory

Change category for plugins from 'network' to 'wireless'

fix wrong example-graph filenames

Use JSON format to obtain data from 'ceph -s'

'ceph -s' text output format strongly depends upon ceph version. Using JSON format to obtain data works across different ceph versions.

Revert "nginx_byprojects: use more compatible perl expression"

This reverts commit a836f07d56e35d230cdd9586bd35aae6343e9771.

Closes: #922

Fix Odd number of elements in hash at linux_diskstat_ line 321

Reading from /sys/block/*/stat does not provide the disk major and minor
numbers (versus reading from /proc/diskstats). When saving the disk data
back to a temp state file, these empty values for the disk major and...

Merge pull request #921 from sulaweyo/master

rtorrent version 0.9.7 compatible

Merge branch 'plugin-multibandwidth'

Plugin multibandwidth: unify whitespace