Added the disconnect proto

lib/ftp.h

@@ -26,12 +26,10 @@
 CURLcode Curl_ftp(struct connectdata *conn);
 CURLcode Curl_ftp_done(struct connectdata *conn);
 CURLcode Curl_ftp_connect(struct connectdata *conn);
+CURLcode Curl_ftp_disconnect(struct connectdata *conn);
 
 size_t Curl_ftpsendf(int fd, struct connectdata *, char *fmt, ...);
 
-struct curl_slist *curl_slist_append(struct curl_slist *list, char *data);
-void curl_slist_free_all(struct curl_slist *list);
-
 /* The kerberos stuff needs this: */
 int Curl_GetFTPResponse(int sockfd, char *buf,
                         struct connectdata *conn,