shadow: update to 4.8.1

Fixed license information.

Removed patch requiring autoreconf and replaced with a configure variable.

Removed faulty patch that broke systems without a disabled crypt size hack.
Replaced with using a SED command as well as bcrypt, which works in musl.

Removed su patch and converted it to a SED command in the Makefile.

Added new shadow utilities.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
(cherry picked from commit 87e5ded04c)

utils/shadow/patches/001-busybox_ash.patch

@@ -1,11 +0,0 @@
---- a/etc/login.defs
-+++ b/etc/login.defs
-@@ -111,7 +111,7 @@ NOLOGINS_FILE	/etc/nologin
- # command as "-su".  If not defined, then ps(1) will display the
- # name of the shell actually being run, e.g. something like "-sh".
- #
--SU_NAME		su
-+#SU_NAME		su
- 
- #
- # *REQUIRED*

utils/shadow/patches/002-disable-ruser-lookup.patch

@@ -1,10 +0,0 @@
---- a/configure.ac
-+++ b/configure.ac
-@@ -200,7 +200,6 @@ dnl XXX - quick hack, should disappear b
- AC_DEFINE(USE_SYSLOG, 1, [Define to use syslog().])
- if test "$ac_cv_func_ruserok" = "yes"; then
- 	AC_DEFINE(RLOGIN, 1, [Define if login should support the -r flag for rlogind.])
--	AC_DEFINE(RUSEROK, 0, [Define to the ruserok() "success" return value (0 or 1).])
- fi
- 
- AC_ARG_ENABLE(shadowgrp,

utils/shadow/patches/004-fix-su-controoling-term.patch

@@ -1,6 +1,6 @@
 --- a/src/su.c
 +++ b/src/su.c
-@@ -1127,8 +1127,12 @@ int main (int argc, char **argv)
+@@ -1122,8 +1122,12 @@ int main (int argc, char **argv)
  
  		if (fd >= 0) {
  			err = ioctl (fd, TIOCNOTTY, (char *) 0);

utils/shadow/patches/005-set-encrypt-method-sha512.patch

@@ -1,11 +0,0 @@
---- a/etc/login.defs
-+++ b/etc/login.defs
-@@ -317,7 +317,7 @@ CHFN_RESTRICT		rwh
- # Note: If you use PAM, it is recommended to use a value consistent with
- # the PAM modules configuration.
- #
--#ENCRYPT_METHOD DES
-+ENCRYPT_METHOD SHA512
- 
- #
- # Only works if ENCRYPT_METHOD is set to SHA256 or SHA512.