def symlink(self, target_path, path):
return SFTP_OP_UNSUPPORTED<EOL>
Create a symbolic link on the server, as new pathname C{path},
with C{target_path} as the target of the link.

@param target_path: path (relative or absolute) of the target for
    this new symbolic link.
@type target_path: str
@param path: path (relative or absolute) of the symbolic link to
    create.
@type path: str
@return: an error code like C{SFTP_OK}.
@rtype: int