Allow backup and restore commands to use IPv6 addresses

IPv6 is supported in the execute backup and execute restore commands to TFTP and FTP servers.

To back up a configuration file to an IPv6 TFTP server:

# execute backup config tftp fgta.conf 2000:172:16:200::55
Please wait...
Connect to tftp server 2000:172:16:200::55 ...

Send config file to tftp server OK.

To restore a configuration file from an IPv6 TFTP server:

# execute restore config tftp fgta.conf 2000:172:16:200::55
This operation will overwrite the current setting and could possibly reboot the system!
Do you want to continue? (y/n)y

Please wait...
Connect to TFTP server 2000:172:16:200::55 ...

Get file from TFTP server OK.
File check OK.
The system is going down NOW !!

To back up a configuration file to an IPv6 FTP server:

# execute backup config ftp fgta.conf 2000:172:16:200::55 root xxxxxxxxxx
Please wait...

Connect to ftp server 2000:172:16:200::55 ...
Send config file to ftp server OK.

To restore a configuration file from an IPv6 FTP server:

# execute restore config ftp fgta.conf 2000:172:16:200::55 root xxxxxxxxxx
This operation will overwrite the current setting and could possibly reboot the system!
Do you want to continue? (y/n)y

Please wait...
Connect to ftp server 2000:172:16:200::55 ...
			
Get config file from ftp server OK.
File check OK.
The system is going down NOW !!