FtpRmdir - Remove a directory from the remote file system.
       #include <ftplib.h>
       int FtpRmdir(const char *path, netbuf *nControl);
       path   A string containing the name of a remote directory.
       nControl
              A handle returned by FtpConnect().
       FtpRmdir() sends a remove directory request to the remote server.
       Returns 1 if successful or 0 on error.