* libmisc/pwdcheck.c: Do not include <pwd.h>. Include <shadow.h>

and "pwauth.h" only when compiled without PAM support.
* src/chfn.c, src/chsh.c: Do not include <shadow.h>
* lib/commonio.c: Do not include <shadow.h>. Do not include
  <pwd.h>. Include "nscd.h" instead of <nscd.h>.
* configure.in: Do not check if shadow.h exist, but make sure it
  exists.
* libmisc/pwdcheck.c, src/chfn.c, src/chsh.c, lib/defines.h,
  lib/shadowmem.c, lib/shadowio.c, lib/commonio.c:
  HAVE_SHADOW_H is no more needed (shadow.h should always exist).

lib/commonio.c

@@ -12,11 +12,7 @@
 #include <errno.h>
 #include <stdio.h>
 #include <signal.h>
-#include <pwd.h>
-#include <nscd.h>
-#ifdef HAVE_SHADOW_H
-#include <shadow.h>
-#endif
+#include "nscd.h"
 #ifdef WITH_SELINUX
 #include <selinux/selinux.h>
 static security_context_t old_context = NULL;

lib/defines.h

@@ -101,19 +101,11 @@ char *strchr (), *strrchr (), *strtok ();
  * Possible cases:
  * - /usr/include/shadow.h exists and includes the shadow group stuff.
  * - /usr/include/shadow.h exists, but we use our own gshadow.h.
- * - /usr/include/shadow.h doesn't exist, use our own shadow.h and gshadow.h.
  */
-#if HAVE_SHADOW_H
 #include <shadow.h>
 #if defined(SHADOWGRP) && !defined(GSHADOW)
 #include "gshadow_.h"
 #endif
-#else				/* not HAVE_SHADOW_H */
-#include "shadow_.h"
-#ifdef SHADOWGRP
-#include "gshadow_.h"
-#endif
-#endif				/* not HAVE_SHADOW_H */
 
 #include <limits.h>
 

lib/shadowio.c

@@ -5,9 +5,7 @@
 
 #include "prototypes.h"
 #include "defines.h"
-#ifdef HAVE_SHADOW_H
-# include <shadow.h>
-#endif
+#include <shadow.h>
 #include <stdio.h>
 #include "commonio.h"
 #include "shadowio.h"

lib/shadowmem.c

@@ -5,9 +5,7 @@
 
 #include "prototypes.h"
 #include "defines.h"
-#ifdef HAVE_SHADOW_H
-# include <shadow.h>
-#endif
+#include <shadow.h>
 #include <stdio.h>
 #include "shadowio.h"