Add disableFallbackIfMatch dns option

[nekohasekai]

Allow query on DNS servers that contain a domains selector, but do not fallback to the default servers when the query fails and disableFallback disabled

[codecov-commenter]

Codecov Report

Merging #1270 (52caeac) into master (c58a372) will decrease coverage by 0.10%.
The diff coverage is 80.95%.

@@            Coverage Diff             @@
##           master    #1270      +/-   ##
==========================================
- Coverage   44.72%   44.62%   -0.11%     
==========================================
  Files         485      484       -1     
  Lines       29465    29447      -18     
==========================================
- Hits        13179    13140      -39     
- Misses      14884    14898      +14     
- Partials     1402     1409       +7     

Impacted Files	Coverage Δ
app/dns/config.pb.go	22.14% <0.00%> (-0.31%)	⬇️
app/dns/dns.go	75.00% <100.00%> (+0.43%)	⬆️
infra/conf/dns.go	63.88% <100.00%> (+0.16%)	⬆️
transport/internet/udp/dispatcher.go	64.76% <0.00%> (-12.39%)	⬇️
common/buf/reader.go	82.35% <0.00%> (-5.89%)	⬇️
transport/internet/udp/hub.go	73.61% <0.00%> (-4.17%)	⬇️
proxy/freedom/freedom.go	45.00% <0.00%> (-4.00%)	⬇️
transport/internet/system_listener.go	50.00% <0.00%> (-4.00%)	⬇️
transport/internet/websocket/connection.go	16.51% <0.00%> (-3.67%)	⬇️
transport/internet/system_dialer.go	46.83% <0.00%> (-2.54%)	⬇️
... and 4 more

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[xiaokangwang]

No issues were discovered. This pull request is ready to be merged.