Imports of package getuserinfo

PathSynopsis
encoding/jsonPackage json implements encoding and decoding of JSON as defined in RFC 7159.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/docker/docker/pkg/idtools
github.com/docker/docker/pkg/reexecPackage reexec facilitates the busybox style reexec of a binary.
golang.org/x/sys/windows
osPackage os provides a platform-independent interface to operating system functionality.