Document utterance_filename

ovos_config/mycroft.conf

@@ -477,8 +477,17 @@
  // Set 'save_utterances' to save each sentence sent to STT -- by default
  // they are only kept briefly in-memory. This can be useful for for
  // debugging or other custom purposes. Recordings are saved
- // under: /'save_path'/mycroft_utterances/<TIMESTAMP>.wav
+ // under: /'save_path'/utterances/'utterance_filename'.wav
  "save_utterances": false,
+
+ // Set 'utterance_filename' based on how you would like to save utterances.
+ // Special keys surrouned by curly braces will be replaces as follows
+ // "{md5}" - the md5 hash of the transcription
+ // "{uuid4}" - a random uuid4
+ // "{now:%Y-%m-%dT%H%M%S%z}" - the local ISO datetime
+ // "{utcnow:%Y-%m-%dT%H%M%S%z}" - the UTC ISO datetime
+ "utterance_filename": "{hash}-{uuid4}"
+
  "wake_word_upload": {
  "disable": true,
  // official mycroft endpoint disabled, enable if you want to collect your own