imp docs, rm unused field, go mod tidy (#13)

go.mod

@@ -1,5 +1,7 @@
 module github.com/ameshkov/dnscrypt/v2
 
+go 1.16
+
 require (
 	github.com/AdguardTeam/golibs v0.4.2
 	github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da
@@ -13,5 +15,3 @@ require (
 	golang.org/x/sys v0.0.0-20200331124033-c3d80250170d // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c
 )
-
-go 1.14

go.sum

@@ -6,14 +6,11 @@ github.com/aead/poly1305 v0.0.0-20180717145839-3fee0db0b635 h1:52m0LGchQBBVqJRyY
 github.com/aead/poly1305 v0.0.0-20180717145839-3fee0db0b635/go.mod h1:lmLxL+FV291OopO93Bwf9fQLQeLyt33VJRUg5VJ30us=
 github.com/ameshkov/dnsstamps v1.0.1 h1:LhGvgWDzhNJh+kBQd/AfUlq1vfVe109huiXw4JhnPug=
 github.com/ameshkov/dnsstamps v1.0.1/go.mod h1:Ii3eUu73dx4Vw5O4wjzmT5+lkCwovjzaEZZ4gKyIH5A=
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/jessevdk/go-flags v1.4.0 h1:4IU2WS7AumrZ/40jfhf4QVDMsQwqA7VEHozFRrGARJA=
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
-github.com/miekg/dns v1.1.29 h1:xHBEhR+t5RzcFJjBLJlax2daXOrTYtr9z4WdKEfWFzg=
-github.com/miekg/dns v1.1.29/go.mod h1:KNUDUusw/aVsxyTYZM1oqvCicbwhgbNgztCETuNZ7xM=
 github.com/miekg/dns v1.1.40 h1:pyyPFfGMnciYUk/mXpKkVmeMQjfXqt3FAJ2hy7tPiLA=
 github.com/miekg/dns v1.1.40/go.mod h1:KNUDUusw/aVsxyTYZM1oqvCicbwhgbNgztCETuNZ7xM=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=

server.go

@@ -18,8 +18,12 @@ const defaultReadTimeout = 2 * time.Second
 // then we start using defaultTCPIdleTimeout
 const defaultTCPIdleTimeout = 8 * time.Second
 
-// defaultUDPSize is the size of the UDP read buffer. Using 1252 by default,
-// see here: https://github.com/AdguardTeam/AdGuardDNS/issues/188
+// defaultUDPSize is the default size of the UDP read buffer.  The release notes
+// for dnscrypt-proxy version 1.1.0-RC1 claim that this size was chosen as the
+// maximum one "for compatibility with some scary network setups", and making it
+// smaller seems to break things for some people.
+//
+// See also: https://github.com/AdguardTeam/AdGuardDNS/issues/188.
 const defaultUDPSize = 1252
 
 // helper struct that is used in several SetReadDeadline calls

server_test.go

@@ -216,7 +216,6 @@ type testServer struct {
 	resolverPk ed25519.PublicKey
 	udpConn    *net.UDPConn
 	tcpListen  net.Listener
-	handler    Handler
 }
 
 func (s *testServer) TCPAddr() *net.TCPAddr {