SILC SFTP Interface is the implementation of the Secure File Transfer
 Protocol (or SSH File Transfer Protocol).  The interface defines the SFTP
 client and the SFTP server.  The SFTP is the mandatory file transfer
 protocol in the SILC protocol, and when used in SILC the SFTP packets are
 encapsulated into SILC packets.  The SFTP server implementation is
 filesystem independent and generic interface is defined to represent
 filesystem access.

 The SilcSFTP context is the actual SFTP client or SFTP server, and each
 SFTP session should create its own SFTP context.

 The SILC SFTP library is a generic SFTP implementation and not directly
 related to either SILC or SSH.  It could be used for any general purpose
 SFTP application.