Changed some values to be explicitly boolean
DO NOT DELETE THIS TEXT
#### Please note
> Please read this information carefully. You can run `./scripts/pre-commit.php` to check your code before submitting.
- [x] Have you followed our [code guidelines?](http://docs.librenms.org/Developing/Code-Guidelines/)
#### Testers
If you would like to test this pull request then please run: `./scripts/github-apply <pr_id>`, i.e `./scripts/github-apply 5926`
... with via ... doesn't really make sense in my opinion. I deleted the "with", because I thought the original meaning was "via", but I guess you could also go for the "with" and delete the "via". This doesn't affect the meaning of the sentence at all and I think people still get the meaning of the sentence. I just think it's fitting for this project when all documents are as close to perfect as possible ;)
* feature: parallel snmp-scan.py
Reduces scan time of a /24 from 5 minutes to 14 seconds
Work is done by addhost.php
Just tries to addhost.php hostname/ip right now
Might need some more complexity added there, but I wasn't sure what.
* respect autodiscovery.nets-exclude
* Improvements in ip handling and output
Add compatibility arguments so it can be used as a drop in replacement for snmp-scan.php
* tidy
* Handle errors from config_to_json.php
* Handle Ctrl-C better. This is likely to get hit when someone scans a /16 or larger or an IPv6 network :)
* Move undefined outcome to proper location
* remove snmp-scan.php