libsiguldry_pkcs11.so is rather verbose

[jeremycline]

By default, it logs at INFO level to stderr.

This means while using it from tools like pesign you'll see something like:

>>>  INFO siguldry_pkcs11: return=0
>>>  INFO C_Initialize{pInitArgs=0x5619b00be620}: siguldry_pkcs11: new
>>>  INFO C_Initialize{pInitArgs=0x5619b00be620}:new{socket_path="/run/siguldry-client-proxy/siguldry-client-proxy.socket"}: siguldry::client::proxy: new
>>>  INFO C_Initialize{pInitArgs=0x5619b00be620}:new{socket_path="/run/siguldry-client-proxy/siguldry-client-proxy.socket"}: siguldry::client::proxy: close
>>>  INFO C_Initialize{pInitArgs=0x5619b00be620}:list_keys: siguldry::client::proxy: new
>>>  INFO C_Initialize{pInitArgs=0x5619b00be620}:list_keys: siguldry::client::proxy: close
>>> ERROR C_Initialize{pInitArgs=0x5619b00be620}: siguldry_pkcs11: Failed to retrieve a list of keys from the server via the proxy error=channel closed
>>>  INFO C_Initialize{pInitArgs=0x5619b00be620}: siguldry_pkcs11: return=6
>>>  INFO C_Initialize{pInitArgs=0x5619b00be620}: siguldry_pkcs11: close

It should maybe default to WARN. It might also be best to emit to the systemd journal by default, too.