build-sys: C99 has true and false

It is pointless to define true and false when standard headers can do
that.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

src/dhcpd-pools.c

@@ -50,6 +50,7 @@ extern char *malloc();
 #include <err.h>
 #include <errno.h>
 #include <getopt.h>
+#include <stdbool.h>
 #include <stdio.h>
 
 #include "defaults.h"

src/dhcpd-pools.h

@@ -123,8 +123,6 @@ struct macaddr_t {
 };
 
 /* Global variables */
-static int const true = 1;
-static int const false = 0;
 struct configuration_t config;
 static int const output_limit_bit_1 = 1;
 static int const output_limit_bit_2 = 2;

src/getdata.c

@@ -50,6 +50,7 @@ extern char *malloc();
 #include <errno.h>
 #include <fcntl.h>
 #include <netinet/in.h>
+#include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>

src/other.c

@@ -52,6 +52,7 @@ extern char *malloc();
 
 #include <err.h>
 #include <errno.h>
+#include <stdbool.h>
 #include <stddef.h>
 #include <stdio.h>