dssrf: every IPv6 category bypasses is_url_safe

A vulnerability on dssrf allow, an attacker to use, one of them following ipv6 rust Input Category http://::1/ IPv6 loopback http://fc00::1/ IPv6 ULA http://fe80::1/ IPv6 link-local http://::ffff:127.0.0.1/ IPv4-mapped loopback http://::ffff:169.254.169.254/ IPv4-mapped IMDS...