util: add missing #includes

Detected by activating stronger warnings. If include is missing,
prototypes might diverge.

Signed-off-by: Ralf Ramsauer <ralf@ramses-pyramidenbau.de>

src/login.c

@@ -25,6 +25,7 @@
 #include <arpa/inet.h>
 #endif
 
+#include "login.h"
 #include "md5.h"
 
 /*

src/read.c

@@ -19,6 +19,8 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+#include "read.h"
+
 static int
 readname_loop(char *packet, int packetlen, char **src, char *dst, size_t length, size_t loop)
 {

src/util.c

@@ -17,6 +17,7 @@
 
 #include <stdio.h>
 #include "common.h"
+#include "util.h"
 
 char *
 get_resolvconf_addr()