added Multigraph, Licence

+ added ICS Licence to repo
+ added multiggraph plugin variant with all features included
+ added nextcloud 14 pending app updates plugin
* updated README.md
* updated requests.sessions handeling to reduce keepalive sessions
- removed keepalive header for all plugins

1 files changed, 20 insertions, 6 deletions

diff --git a/README.md b/README.md
index 45bf39c..267f9a8 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Nextcloud Munin Plugin
-Some basic Munin Plugins gathering information from the NextCloud external API.
+Within this repository there are some basic Munin Plugins gathering information from the NextCloud external API. I choose to also include a multigraph plugin `nextcloud_multi` which does everything the other plugins do but in one single request.
+
+There are drawbacks to using a multigraph plugin which can be read up here : [Munin-Monitoring.org](http://guide.munin-monitoring.org/en/latest/plugin/multigraphing.html)
 
 ## install
 To use these plugins properly some configuration parameters need to be added to the plugin-config `/etc/munin/plugin-config.d/munin-node`. 
@@ -9,21 +11,33 @@ url = https://URL.TO.YOUR.NEXTCLOUD.tld/ocs/v2.php/apps/serverinfo/api/v1/info
 username = username
 password = password or logintoken
 ```
-After that the script needs to be placed in the munin plugin directory eg. `/etc/munin/plugins/`
+To install these plugins, you just have to symlink those plugins you would like to activate to the munin plugin directory eg. `/etc/munin/plugins/`. Or if you want to use the multigraph plugin only symlink that one the the munin plugin directory.
 
-The munin-node needs to be restarted to facilitate the new plugins.
+After this has been done the munin-node needs to be restarted to facilitate the new plugins.
 `systemctl restart munin-node`
 
 ### everything working?
-To check if everything is working as expected check if the plugins actually gather data.
+To check if everything is working as expected check if the plugins are listed and actually gather data.
 ```
 telnet localhost 4949 # localhost or IP the munin-node
 list
 fetch nextcloud_shares
 fetch nextcloud_users
+fetch nextcloud_db
+fetch nextcloud_apps
+```
+If everything works as it should, list will return the symlinked plugins within the list of active plugins. 
+
+##### multipgrah plugin
+To check if the multigraph plugin is working correctly it is necessary to first instruct the capability multigraph before the `list` instruction.
+```
+telnet localhost 4949 # localhost or IP the munin-node
+cap multigraph
+list
+fetch nextcloud_multi
 ```
 
-If everything works as it should, list will return `nextcloud_shares` and `nextcloud_users` within the list of other active plugins. The `fetch` commands will run the script and return the gathered values. As long as none of them are NaN everything works as expected.
+The `fetch` commands will run the script and return the gathered values. As long as none of them are NaN everything works as expected.
 
 ### uninstall
-To remove the plugins from munin remove both plugins from the directory and restart the node.
+To remove the plugins from munin remove all symlinked plugins from the directory and restart the node.