Make things compile on OpenBSD

Submitted by:	Brad Smith <brad@comstyle.com>

bin/varnishd/cache/cache_dir_dns.c

@@ -29,6 +29,8 @@
 
 #include "config.h"
 
+#include <sys/types.h>
+#include <sys/socket.h>
 #include <netinet/in.h>
 
 #include <netdb.h>

bin/varnishd/cache/cache_vrt.c

@@ -31,6 +31,8 @@
 
 #include "config.h"
 
+#include <sys/types.h>
+#include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 

bin/varnishd/mgt/mgt_cli.c

@@ -31,6 +31,7 @@
 
 #include "config.h"
 
+#include <sys/types.h>
 #include <sys/socket.h>
 
 #include <fcntl.h>

bin/varnishd/storage/stevedore_utils.c

@@ -34,6 +34,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #ifdef HAVE_SYS_MOUNT_H
+#  include <sys/param.h>
 #  include <sys/mount.h>
 #endif
 #ifdef HAVE_SYS_STATVFS_H