vendor: update c/common

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

vendor/github.com/pkg/sftp/server_posix.go

@@ -0,0 +1,21 @@
+//go:build !windows
+// +build !windows
+
+package sftp
+
+import (
+	"io/fs"
+	"os"
+)
+
+func (s *Server) openfile(path string, flag int, mode fs.FileMode) (file, error) {
+	return os.OpenFile(path, flag, mode)
+}
+
+func (s *Server) lstat(name string) (os.FileInfo, error) {
+	return os.Lstat(name)
+}
+
+func (s *Server) stat(name string) (os.FileInfo, error) {
+	return os.Stat(name)
+}