Don't block DNS, DHCP and WebUI loading with query log parsing

[ilya-fedin]

Steps to reproduce

1. Buy Irbis A or other device with Alisa (or make a lot of requests)
2. If block telemtry (which in default lists so), it will generate ~100-200K requests in 24 hours
3. In 24 hours log will have size of ~96MB
4. Adguard will start very long (at least on HDD)

Expected behavior

DNS, DHCP and WebUI start immediately, query log parsing in other thread

Actual behavior

DNS, DHCP and WebUI waits query log parsing to be end, as result, some services may working incorrectly without DNS on start (and it happens)

Your environment

Raspberry Pi 2 with Raspbian Stretch and HDD connected over USB as root

Description	Value
Version of AdGuard Home server:	v0.95-hotfix
How did you setup DNS configuration:	Router
If it's a router or IoT, please write device model:	Raspberry Pi 2
Operating system and version:	Raspbian Stretch

[szolin]

Query logs access is now dynamic - it doesn't interfere with startup.