install_fw: Add catching ssh2.SocketRecvError on reboot

install_fw.py

@@ -1112,9 +1112,14 @@ class XqFlash():
             gw.run_cmd("sync ; umount -a", timeout = 5)
             print("Please, reboot router!")
         else:
+            import ssh2
             print('Send command "reboot" via SSH/Telnet ...')
-            gw.run_cmd("reboot -f", die_on_error = False)
-            print("Forced REBOOT activated!")
+            try:
+                gw.run_cmd("reboot -f", die_on_error = False)
+                print("Forced REBOOT activated!")
+            except ssh2.exceptions.SocketRecvError as e:
+                print("Forced REBOOT Activated!")
+                pass 
 
     def flash_data_to_mtd(self, img_name, img: Image, timeout, check = True):
         print(f'Writing {img_name} image to addr 0x{img.addr:08X} ...')