Add Feature to discover backup files.

[IppSec]

Added the -d flag to DiscoverContent. This will take all files with a 200 HTTP Response and then mutate the file to find backup copies.

Example:
index.php ->

• index.php~
• index.php.bak
• index.bak
• .index.php.swp

[firefart]

@IppSec thanks for your contribution! I think we already have this implemented in the v3.1-working branch over here https://github.com/OJ/gobuster/tree/v3.1-working with the new --pattern option:
https://github.com/OJ/gobuster/tree/v3.1-working#patterns

Does that fit?

[IppSec]

I think they are different but I don’t fully understand the pattern option.

The main difference is this generates the wordlist based upon found files, whereas pattern applies it to everything in the dirlist. Additionally, I don’t think patterns supports removing extension then appending items.

[firefart]

Oh ok so it only searches backups for found files, missed that. Can you please rebase the branch on the v3.1-working branch as this is the current development version? Thanks!

[IppSec]

Created #201 to rebase against my v3.1 branch.