Make logging level configurable without requiring recompilation

[rski]

or document if it is available via an rpc somewhere

[pguibert6WIND]

could you please be more explicit about that.
you mean log messages from zrpc?

[rski]

Ah sorry, I had this in my head but didn't write it down.

Here:
https://github.com/6WIND/zrpcd/blob/master/zrpcd/zrpc_debug.h#L19
#define IS_ZRPC_DEBUG (zrpc_debug & ZRPC_DEBUG)

ZRPC_DEBUG is true but it seems like zrpcd_debug is initialised to false and I can't figure out how to modify it using the constructs defined here

[pguibert6WIND]

The logging level is set by default to on in function zrpc_debug_init().
To change the logging level, there is a thrift API called setLogConfig() that is handling the severity and where to dump the traces.
open to suggestions.