tests: fix pkd build breakages

Fix a build breakage when '-DWITH_SERVER=OFF' is set: skip building the
pkd test for that case.  Add some missing includes for the OpenIndiana
and FreeBSD builds.

Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

tests/pkd/pkd_daemon.c

@@ -8,11 +8,14 @@
  */
 
 #include <errno.h>
+#include <netinet/in.h>
 #include <pthread.h>
 #include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
 
 #include <libssh/callbacks.h>
 #include <libssh/libssh.h>