ftp: mark ftp.command as firewall supported

Ticket: #8392

src/detect-ftp-command.c

@@ -81,7 +81,7 @@ void DetectFtpCommandRegister(void)
     sigmatch_table[DETECT_FTP_COMMAND].desc = "sticky buffer to match on the FTP command buffer";
     sigmatch_table[DETECT_FTP_COMMAND].url = "/rules/" KEYWORD_DOC;
     sigmatch_table[DETECT_FTP_COMMAND].Setup = DetectFtpCommandSetup;
-    sigmatch_table[DETECT_FTP_COMMAND].flags |= SIGMATCH_NOOPT;
+    sigmatch_table[DETECT_FTP_COMMAND].flags |= SIGMATCH_NOOPT | SIGMATCH_SUPPORT_FIREWALL;
 
     g_ftp_cmd_buffer_id = SCDetectHelperBufferProgressMpmRegister(BUFFER_NAME, BUFFER_DESC,
             ALPROTO_FTP, STREAM_TOSERVER, DetectFTPCommandGetData, FTP_STATE_FINISHED);