Function SilcSFTPNameCallback
SYNOPSIS
typedef void (*SilcSFTPNameCallback)(SilcSFTP sftp,
SilcSFTPStatus status,
const SilcSFTPName name,
void *context);
DESCRIPTION
Name callback is called when directory is being read by the client.
The server returns one or more file names in one reply. These file
names are saved in the `filename' structures with their short and
long name format, and with file attributes.