Add input support for AS identifiers

[ShubhamRasal]

• Nuclei should accept the asn number eg AS15133 and performs the template processing on the IP address available for that ASN. eg: echo AS15133 | nuclei -id ptr-fingerprint

[ShubhamRasal]

❯ echo AS15133 | nuclei -id ptr-fingerprint

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   2.7.8

        projectdiscovery.io

[WRN] Use with caution. You are responsible for your actions.
[WRN] Developers assume no liability and are not responsible for any misuse or damage.
[INF] Supplied input was automatically deduplicated (18176 removed).
[WRN] Found 4 templates with syntax error (use -validate flag for further examination)
[INF] Using Nuclei Engine 2.7.8 (latest)
[INF] Using Nuclei Templates 9.2.4 (latest)
[INF] Templates added in last update: 40
[INF] Templates loaded for scan: 1
[2022-10-20 17:51:48] [ptr-fingerprint] [dns] [info] 108.161.240.132 [core1.bur.edgecastcdn.net.]
[2022-10-20 17:51:49] [ptr-fingerprint] [dns] [info] 108.161.240.134 [smtp5.edgecast.com.]
[2022-10-20 17:51:49] [ptr-fingerprint] [dns] [info] 108.161.240.173 [smtpbur.edgecastcdn.net.]
[2022-10-20 17:51:49] [ptr-fingerprint] [dns] [info] 108.161.240.171 [smtp4.edgecast.com.]
[2022-10-20 17:51:49] [ptr-fingerprint] [dns] [info] 108.161.240.230 [border2.bur.edgecastcdn.net.]
[2022-10-20 17:51:49] [ptr-fingerprint] [dns] [info] 108.161.240.231 [core1.lax.edgecastcdn.net.]
[2022-10-20 17:51:49] [ptr-fingerprint] [dns] [info] 108.161.240.233 [core1.bur.edgecastcdn.net.]
[2022-10-20 17:51:49] [ptr-fingerprint] [dns] [info] 108.161.240.237 [core1.lax.edgecastcdn.net.]