run modernize -fix ./...

Using golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize

+ some manual cleanup in libpod/lock/shm/shm_lock_test.go as it
  generated an unused variable
+ restored one removed comment

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

pkg/specgenutil/util.go

@@ -62,7 +62,7 @@ func CreateExpose(expose []string) (map[uint16]string, error) {
 		}
 
 		var index uint16
-		for index = 0; index < len; index++ {
+		for index = range len {
 			portNum := start + index
 			protocols, ok := toReturn[portNum]
 			if !ok {