* update to [2021-09-27](da2501f542)
* fixes https://github.com/aarond10/https_dns_proxy/issues/125
* restart instead of reload on interface hotplug
* fixes https://github.com/openwrt/packages/issues/16794
* produce output and log entries on service start/stop
* prevent unnecessary dnsmasq restarts if service has previously updated dnsmasq settings
* allow both named and typed dnsmasq instance settings to be updated
* update 010-fix-cmakelists patch file

Signed-off-by: Stan Grishin <stangri@melmac.net>

* update binary to the latest commit (2021-07-29) to fix #16222 and #16239
* add hotplug.d/iface file and update Makefile to install it
* use Cloudflare's and Google's bootstrap DNS if bootstrap DNS is missing
* minor improvements in append_bool function
* add append_counter function for verbosity setting
* add append_bootstrap function (and supporting functions) to parse/sanitize bootstrap setting
* move firewall array from 'main' instance to the first proxy instance
* delete useless 'main' instace

Signed-off-by: Stan Grishin <stangri@melmac.net>