src: add --literal option

src: add --literal option

Default not to print the service name as we discussed during the NFWS.

 # nft list ruleset
 table ip x {
        chain y {
                tcp dport 22
                ip saddr 1.1.1.1
        }
 }

 # nft -l list ruleset
 table ip x {
        chain y {
                tcp dport ssh
                ip saddr 1.1.1.1
        }
 }

 # nft -ll list ruleset
 table ip x {
        chain y {
                tcp dport 22
                ip saddr 1dot1dot1dot1.cloudflare-dns.com
        }
 }

Then, -ll displays FQDN. just like the (now deprecated) --ip2name (-N)
option.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>