HC: prototypes for the server command handlers
CC: array of server commands
AT: server_command
-IN: server user_list
+IN: para afh server list user_list
SN: list of server commands
---
N: chs
-P: DB_READ | DB_WRITE
+P: AFS_READ | AFS_WRITE
D: change the current audio file selector
U: chs [new_selector]
H: Shutdown the current selector and activate new_selector. If no