Pull request: 2276 no golangci

Merge in DNS/adguard-home from 2276-no-golangci to master

Updates #2276.

Squashed commit of the following:

commit 81a5a62716b8c57e8575cf149938cd941660b6f5
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Dec 8 16:59:19 2020 +0300

    all: fix Makefile

commit a8f2546803a3986f1292b45921c27409366bc04a
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Dec 8 16:11:09 2020 +0300

    all: remove golangci-yaml, add new linters

scripts/go-install-tools.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+test "$VERBOSE" = '1' && set -x
+set -e -f -u
+
+# TODO(a.garipov): Add goconst?
+
+env GOBIN="${PWD}/bin" "$GO" install --modfile=./internal/tools/go.mod\
+	github.com/fzipp/gocyclo/cmd/gocyclo\
+	github.com/golangci/misspell/cmd/misspell\
+	github.com/gordonklaus/ineffassign\
+	github.com/kisielk/errcheck\
+	github.com/kyoh86/looppointer/cmd/looppointer\
+	github.com/securego/gosec/v2/cmd/gosec\
+	golang.org/x/lint/golint\
+	golang.org/x/tools/go/analysis/passes/nilness/cmd/nilness\
+	golang.org/x/tools/go/analysis/passes/shadow/cmd/shadow\
+	honnef.co/go/tools/cmd/staticcheck\
+	mvdan.cc/gofumpt\
+	mvdan.cc/unparam\
+	;