all: update go doc comments

While at it, use "_" for unused parameter on methods.

4 files changed, 10 insertions, 4 deletions

diff --git a/cmd/rescached/main.go b/cmd/rescached/main.go
index 6173943..e94be5e 100644
--- a/cmd/rescached/main.go
+++ b/cmd/rescached/main.go
@@ -1,6 +1,12 @@
 // SPDX-FileCopyrightText: 2018 M. Shulhan <ms@kilabit.info>
 // SPDX-License-Identifier: GPL-3.0-or-later
 
+// Program rescached server that caching internet name and address on local
+// memory for speeding up DNS resolution.
+//
+// Rescached primary goal is only to caching DNS queries and answers, used by
+// personal or small group of users, to minimize unneeded traffic to outside
+// network.
 package main
 
 import (
diff --git a/cmd/resolver/doc.go b/cmd/resolver/doc.go
index 03222c0..8396dec 100644
--- a/cmd/resolver/doc.go
+++ b/cmd/resolver/doc.go
@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 /*
-Command resolver is command line interface (CLI) for DNS and rescached server.
+Program resolver is command line interface (CLI) for DNS and rescached server.
 
 # SYNOPSIS
 
diff --git a/cmd/resolver/main.go b/cmd/resolver/main.go
index c8e5fe7..848d679 100644
--- a/cmd/resolver/main.go
+++ b/cmd/resolver/main.go
@@ -36,9 +36,8 @@ const (
 	subCmdUpdate  = "update"
 )
 
-var (
-	Usage string // Contains usage of program, overwritten by build.
-)
+// Usage of program, overwritten by build.
+var Usage string
 
 func main() {
 	var (
diff --git a/cmd/resolverbench/main.go b/cmd/resolverbench/main.go
index 3e35e24..0821d29 100644
--- a/cmd/resolverbench/main.go
+++ b/cmd/resolverbench/main.go
@@ -1,6 +1,7 @@
 // SPDX-FileCopyrightText: 2018 M. Shulhan <ms@kilabit.info>
 // SPDX-License-Identifier: GPL-3.0-or-later
 
+// Program resolverbench program to benchmark DNS server or resolver.
 package main
 
 import (