added --exts argument in order to specify which file extension(s) should be scanned

[emmanubo]

added --exts argument in order to specify which file extension(s) should be scanned.
This change is fully implemented in yara.c.
Usage example :

 yara64.exe -C webshells.bin c:\inetpub\wwwroot  --exts=.asp/.aspx/.jsp/.php

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[emmanubo]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for all the commit author(s) or Co-authors. If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.
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@googlebot I fixed it.

[emmanubo]

@googlebot I fixed it.

[DanielRuf]

Can you remove the .vs and windows files / folders from this PR?

[DanielRuf]

Why is the separator for the option list / instead of ,?

See also the current CLI options and how they are used, for example multiple -t options to create an array.

[emmanubo]

Hello Daniel, I cleaned up unneeded files in the PR (I couldn't delete the sqllite file but it's not required). Regarding the use of "/" as a separator, let's say it's a personal choice but using "," is fine too. I hope this feature will be implemented. I understand that you need the opposite feature (to select files not having a specific ext), I think it would be nice to have it too.

[DanielRuf]

Hello Daniel, I cleaned up unneeded files in the PR (I couldn't delete the sqllite file but it's not required).

Thank you very much. Looks much better now.

Regarding the use of "/" as a separator, let's say it's a personal choice but using "," is fine too

I think this is the least problem since the final implementation can still change, as long as it works.

I hope this feature will be implemented.

I hope so too.

I understand that you need the opposite feature (to select files not having a specific ext), I think it would be nice to have it too.

Exactly. I need the opposite (exclude specific file extensions from the scan).