eliminated some FreeBSD build warnings

src/plugin_codecfilter.c

@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <stdlib.h>
 #include <string.h>
 
 #include <sys/types.h>

src/plugin_fix_bogus_via.c

@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <stdlib.h>
 #include <string.h>
 
 #include <sys/types.h>

src/plugin_fix_fbox_anoncall.c

@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <stdlib.h>
 #include <string.h>
 
 #include <sys/types.h>

src/plugin_siptrunk.c

@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <stdlib.h>
 #include <string.h>
 #include <regex.h>
 

src/plugin_stripheader.c

@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <stdlib.h>
 #include <string.h>
 
 #include <sys/types.h>

src/plugin_stun.c

@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <stdlib.h>
 #include <string.h>
 
 #include <sys/types.h>

src/plugins.c

@@ -22,6 +22,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <stdlib.h>
 
 #include <sys/types.h>
 #include <netinet/in.h>

src/rtpproxy_relay.c

@@ -118,7 +118,7 @@ int rtp_relay_init( void ) {
    pthread_attr_init(&attr);
    pthread_attr_init(&attr);
    pthread_attr_getstacksize (&attr, &stacksize);
-   INFO("Current thread stacksize is %i kB",stacksize/1024);   
+   INFO("Current thread stacksize is %lu kB",(stacksize/1024));
 
    /* experimental feature:
     * reduce the thread stack size to reduce the overall