Pull request: all: opt log levels

Updates #3929.

Squashed commit of the following:

commit bfb2361
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Dec 24 17:23:39 2021 +0300

    all: opt log levels

go.mod

@@ -3,7 +3,7 @@ module github.com/AdguardTeam/AdGuardHome
 go 1.17
 
 require (
-	github.com/AdguardTeam/dnsproxy v0.40.0
+	github.com/AdguardTeam/dnsproxy v0.40.1
 	github.com/AdguardTeam/golibs v0.10.3
 	github.com/AdguardTeam/urlfilter v0.15.1
 	github.com/NYTimes/gziphandler v1.1.1

go.sum

@@ -7,8 +7,8 @@ dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBr
 dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1:a1inKt/atXimZ4Mv927x+r7UpyzRUf4emIoiiSC2TN4=
 dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
 git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
-github.com/AdguardTeam/dnsproxy v0.40.0 h1:4JeOCG7aOEQxXhvAZwI7VknuHjXYJlwehO5ufkkrJaQ=
-github.com/AdguardTeam/dnsproxy v0.40.0/go.mod h1:PZ9l22h3Er+5mxFQB7oHZMTvx+aa9R6LbzA/ikXQlS0=
+github.com/AdguardTeam/dnsproxy v0.40.1 h1:lYNi7VeCBhmdyf5xEUxfj84ikgiz5cjzocL9moiIRhk=
+github.com/AdguardTeam/dnsproxy v0.40.1/go.mod h1:PZ9l22h3Er+5mxFQB7oHZMTvx+aa9R6LbzA/ikXQlS0=
 github.com/AdguardTeam/golibs v0.4.0/go.mod h1:skKsDKIBB7kkFflLJBpfGX+G8QFTx0WKUzB6TIgtUj4=
 github.com/AdguardTeam/golibs v0.4.2/go.mod h1:skKsDKIBB7kkFflLJBpfGX+G8QFTx0WKUzB6TIgtUj4=
 github.com/AdguardTeam/golibs v0.9.2/go.mod h1:fCAMwPBJ8S7YMYbTWvYS+eeTLblP5E04IDtNAo7y7IY=

internal/home/controlinstall.go

@@ -298,7 +298,11 @@ func shutdownSrv(ctx context.Context, srv *http.Server) {
 
 	err := srv.Shutdown(ctx)
 	if err != nil {
-		log.Error("error while shutting down http server %q: %s", srv.Addr, err)
+		if errors.Is(err, context.Canceled) {
+			log.Debug("shutting down http server %q: %s", srv.Addr, err)
+		} else {
+			log.Error("shutting down http server %q: %s", srv.Addr, err)
+		}
 	}
 }