Support saving httpx results to database

[ipsecc]

Describe your feature request

Add results reporting database, like -rdp in nuclei.

-rdb, -report-db string       httpx reporting database (always use this to persist report data)

Saving httpx results to a MongoDB database would be a great feature, I found it in the latest update of nuclei refer to nuclei

[GeorginaReeder]

Thanks for your feature request @ipsecc , we'll take a look into this!