Make it possible to disable certain client sources
Clients might want to disable some of our client information enriching functionality, like WHOIS and arp, for various reasons. Here is one example with arp, and I'm pretty sure I remember somebody wanting to disable either rDNS or WHOIS. And in fact, we already have a separate boolean for /etc/hosts parsing.
It could be a setting in a new separate block, like:
'clients':
'disabled_sources':
- 'rdns'
@ameshkov, what do you think?