Add DNS name resolution capability to ctfr

[andrewchiles]

No description provided.

[houey]

These -r option seems to have an impact on the -o option. when logging to output with -o I only see that last entry found.

[andrewchiles]

Good catch @houey! I didn't initially realize that the subdomains were being written one by one and opening/closing the file for each subdomain in the list. The latest commit properly writes all domain names with a single file open operation. I didn't include the IPs in the file output, but the console output is easy enough to redirect to file.

[houey]

I'll test it out and thank you for this feature. makes it super useful in combatting some abuse scenarios!