CC: array of commands for the playlist audio file selector
AT: server_command
IN: server user_list
+SN: list of playlist selector commands
---
N: ppl
P: DB_READ
D: print playlist
-S: ppl
+U: ppl
H: Print out the current playlist
---
N: lpl
P: DB_WRITE
D: load playlist
-S: lpl
+U: lpl
H: Read a new playlist from stdin. Example:
H: find /audio -name '*.mp3' | para_client lpl
---