Switch to containers/common for seccomp

The seccomp/containers-golang library is not maintained any more and we
should stick to containers/common.

Signed-off-by: Sascha Grunert <sgrunert@suse.com>

vendor/github.com/containers/common/pkg/config/config_linux.go

@@ -1,7 +1,26 @@
 package config
 
-import selinux "github.com/opencontainers/selinux/go-selinux"
+import (
+	"os"
+
+	"github.com/containers/storage/pkg/unshare"
+	selinux "github.com/opencontainers/selinux/go-selinux"
+)
 
 func selinuxEnabled() bool {
 	return selinux.GetEnabled()
 }
+
+func customConfigFile() (string, error) {
+	if path, found := os.LookupEnv("CONTAINERS_CONF"); found {
+		return path, nil
+	}
+	if unshare.IsRootless() {
+		path, err := rootlessConfigPath()
+		if err != nil {
+			return "", err
+		}
+		return path, nil
+	}
+	return OverrideContainersConfig, nil
+}