Make file deletion with ftp use the correct port.

Score 1 for the tests.

getssl

@@ -1608,22 +1608,21 @@ for d in "${alldomains[@]}"; do
             # shellcheck disable=SC2086
             curl ${_NOMETER} -u "${davsuser}:${davspass}" -X "DELETE" "https://${davshost}:${davsport}${davsdirn}${davsfile}"
         elif [[ "${t_loc:0:6}" == "ftpes:" ]] || [[ "${t_loc:0:5}" == "ftps:" ]] ; then
-            if [ -n "$FTP_PORT" ]; then SFTP_PORT=":${FTP_PORT}"; fi
+            # FTPES (FTP over explicit TLS/SSL, port 21) and FTPS (FTP over implicit TLS/SSL, port 990).
             debug "using ftp to delete the file from $from"
             ftpuser=$(echo "${t_loc}"| awk -F: '{print $2}')
             ftppass=$(echo "${t_loc}"| awk -F: '{print $3}')
             ftphost=$(echo "${t_loc}"| awk -F: '{print $4}')
             ftplocn=$(echo "${t_loc}"| awk -F: '{print $5}')
-            SFTP_PORT=""
-            if [ -z "$FTP_PORT" ]; then
-                SFTP_PORT=":990"
-            fi
+
+            if [ -n "$FTP_PORT" ]; then SFTP_PORT=":${FTP_PORT}"; else SFTP_PORT=""; fi
             debug "ftp user=$ftpuser - pass=$ftppass - host=$ftphost file=${ftplocn}/${token:?}"
             if [[ "${to:0:5}" == "ftps:" ]] ; then
-            # shellcheck disable=SC2086
+              [ -z "$FTP_PORT" ] && SFTP_PORT=":990"
+                # shellcheck disable=SC2086
                 curl ${_NOMETER} $FTPS_OPTIONS --ftp-ssl --ftp-ssl-reqd -u "${ftpuser}:${ftppass}" --silent -Q "DELE ${token:?}}" "ftp://${ftphost}${SFTP_PORT}/${ftplocn}/"
             else
-            # shellcheck disable=SC2086
+                # shellcheck disable=SC2086
                 curl ${_NOMETER} $FTPS_OPTIONS --ftp-ssl --ftp-ssl-reqd -u "${ftpuser}:${ftppass}" --silent -Q "DELE ${token:?}" "ftp://${ftphost}${SFTP_PORT}/${ftplocn}/"
             fi
         else