Tests:
- Visit the names app. New 'Domains' heading and configuration section appear.
- DNS-over-TLS configuration option is as expected.
- When the configuration file does not exist, the option selected is 'no'.
- When the configuration option is changed, 'resolvectl' shows the newly set
configuration. Using 'resolvectl query {domain}' does not work when DoT is on
and server does not support DoT. 'opportunistic' and 'no' work on those cases.
- When a DNS server supporting DoT (such as 1.1.1.1) is manually set, resolution
with all three settings works.
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: Veiko Aasa <veiko17@disroot.org>