memzero.h: Move memzero() and strzero() to their own header

Cc: Christian Göttsche <cgzones@googlemail.com>
Cc: Serge Hallyn <serge@hallyn.com>
Cc: Iker Pedrosa <ipedrosa@redhat.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

src/chage.c

@@ -29,6 +29,7 @@
 #include "alloc.h"
 #include "prototypes.h"
 #include "defines.h"
+#include "memzero.h"
 #include "pwio.h"
 #include "shadowio.h"
 #include "shadowlog.h"

src/faillog.c

@@ -20,6 +20,7 @@
 #include <assert.h>
 #include "defines.h"
 #include "faillog.h"
+#include "memzero.h"
 #include "prototypes.h"
 /*@-exitarg@*/
 #include "exitcodes.h"

src/gpasswd.c

@@ -23,6 +23,7 @@
 #include "alloc.h"
 #include "defines.h"
 #include "groupio.h"
+#include "memzero.h"
 #include "nscd.h"
 #include "sssd.h"
 #include "prototypes.h"

src/groupadd.c

@@ -27,6 +27,7 @@
 #include "defines.h"
 #include "getdef.h"
 #include "groupio.h"
+#include "memzero.h"
 #include "nscd.h"
 #include "sssd.h"
 #include "prototypes.h"

src/lastlog.c

@@ -25,6 +25,7 @@
 #include "defines.h"
 #include "prototypes.h"
 #include "getdef.h"
+#include "memzero.h"
 /*@-exitarg@*/
 #include "exitcodes.h"
 #include "shadowlog.h"

src/login.c

@@ -30,6 +30,7 @@
 #include "faillog.h"
 #include "failure.h"
 #include "getdef.h"
+#include "memzero.h"
 #include "prototypes.h"
 #include "pwauth.h"
 /*@-exitarg@*/

src/passwd.c

@@ -23,6 +23,7 @@
 #include "alloc.h"
 #include "defines.h"
 #include "getdef.h"
+#include "memzero.h"
 #include "nscd.h"
 #include "sssd.h"
 #include "prototypes.h"

src/sulogin.c

@@ -18,6 +18,7 @@
 #include <sys/ioctl.h>
 #include "defines.h"
 #include "getdef.h"
+#include "memzero.h"
 #include "prototypes.h"
 #include "pwauth.h"
 /*@-exitarg@*/

src/useradd.c

@@ -42,6 +42,7 @@
 #include "faillog.h"
 #include "getdef.h"
 #include "groupio.h"
+#include "memzero.h"
 #include "nscd.h"
 #include "sssd.h"
 #include "prototypes.h"

src/usermod.c

@@ -37,6 +37,7 @@
 #include "faillog.h"
 #include "getdef.h"
 #include "groupio.h"
+#include "memzero.h"
 #include "nscd.h"
 #include "sssd.h"
 #include "prototypes.h"