conf: parsers: update decoding rule for 'docker'
The new improvements on JSON->Msgpack encoding helps to reduce
the work on custom decoders used before. From now using a simple 'json'
decoder is enough to get expected results in outgoing strings.
Time_Keep On
# Command | Decoder | Field | Optional Action
# =============|==================|=================
- Decode_Field_As escaped log
- Decode_Field_As escaped stream
+ Decode_Field_As json log
[PARSER]
Name docker-daemon
