Currently, ctrld force NetworkManager ignore auto DNS setup from DHCP
per connection. This does not work well, because an interface can be
attached to many connections. So if `ctrld` started with a connection,
then user connect to new one, the DNS configured by ctrld will be
override.
Instead, we can force NetworkManager not to manage DNS by:
- Using dns=none
- Set systemd-resolved=false
So NetworkManager won't attempt to send DNS setup to systemd-resolved,
leaving what ctrld set as-is.
Supported actions:
- start: install and start ctrld as a system service
- stop: stop the ctrld service
- restart: restart ctrld service
- status: show status of ctrld service
- uninstall: remove ctrld from system service
Currently, os resolver not only handle A and AAAA records, but also does
it wrongly, since when it packs AAAA record to a dns.A record.
This commit reworks os resolver to make it works with all supported
record types.
This commit adds config params to enable local DNS response caching and
control its behavior, allow tweaking the cache size, ttl override and
serving stale response.
