Added docs, fixed incorrect kill switch names

docs/Killswitches.md

@@ -0,0 +1,53 @@
+# Kill Switches
+
+EDMarketConnector implements a Kill Switch system that allows us to disable features based on a version mask. Meaning that we can stop major bugs from affecting the services we support, at the expense of disabling that support.
+
+## Format
+
+Killswitches are stored in a JSON file that is queried by EDMC on startup. The format is as follows:
+
+|             Key |  Type   | Description                                                   |
+| --------------: | :-----: | :------------------------------------------------------------ |
+|       `version` | integer | the version of the Kill Switch JSON file, always 1            |
+|  `last_updated` | string  | When last the kill switches were updated (for human use only) |
+| `kill_switches` |  array  | The kill switches this file contains (expanded below)         |
+
+The `kill_switches` array contains kill switch objects. Each contains two fields:
+
+|       Key |        Type        | Description                                                             |
+| --------: | :----------------: | :---------------------------------------------------------------------- |
+| `version` | `semantic version` | The version of EDMC these kill switches apply to (Must be valid semver) |
+|   `kills` |  array of strings  | The different keys to disable                                           |
+An example follows:
+
+```json
+{
+    "version": 1,
+    "last_updated": "19 October 2020",
+    "kill_switches": [
+        {
+            "version": "1.0.0",
+            "kills": ["plugins.eddn.send"]
+        }
+    ]
+}
+```
+
+### Versions
+
+Versions are checked using equality checks on `semantic_version.Version` instances. Meaning that **all** fields are checked (ie, Major, Minor, Patch, Prerelease, and Build).
+
+## Plugin support
+
+Plugins may use the killswitch system simply by hosting their own version of the killswitch file, and fetching it
+using `killswitch.get_kill_switches(target='https://example.com/myplugin_killswitches.json')`. The returned object can
+be used to query the kill switch set, see the docstrings for more information on specifying versions.
+
+## Currently supported killswitch strings
+
+The current recognised (to EDMC and its internal plugins) killswitch strings are as follows:
+| Kill Switch            | Description                                                                               |
+| :--------------------- | :---------------------------------------------------------------------------------------- |
+| `plugins.eddn.send`    | Disables all use of the send method on EDDN (effectively disables EDDN updates)           |
+| `plugins.edsm.worker`  | Disables the send portion of the EDSM worker thread (effectively disables EDSM updates)   |
+| `plugins.inara.worker` | Disables the send portion of the INARA worker thread (effectively disables INARA updates) |

plugins/eddn.py

@@ -127,7 +127,7 @@ class EDDN:
         :param cmdr: the CMDR to use as the uploader ID
         :param msg: the payload to send
         """
-        if killswitch.is_disabled('plugins.eddn_send'):
+        if killswitch.is_disabled('plugins.eddn.send'):
             logger.warning("eddn.send has been disabled via killswitch. Returning")
             return
 

plugins/edsm.py

@@ -509,7 +509,7 @@ def worker() -> None:
             logger.debug('Empty queue message, setting closing = True')
             closing = True  # Try to send any unsent events before we close
 
-        if killswitch.is_disabled("plugins.eddn.worker"):
+        if killswitch.is_disabled("plugins.edsm.worker"):
             logger.warning('EDSM worker has been disabled via kill switch. Not uploading data.')
             continue