res_send.c: Now compiles

This required adding ISC .h files and adding some defines to
port_before.h.

freebsd-userspace/local/port_before.h

@@ -7,6 +7,16 @@
  */
 #define _LIBC 1
 
+/*
+ *  lib/libc/resolv/res_send.c needs this defined.
+ */
+#define USE_KQUEUE 1
+
+/*
+ *  lib/libc/resolv/res_send.c also needs this defined.
+ */
+#define ISC_SOCKLEN_T   socklen_t
+
 /*
 #ifndef _bsd_off_t
 #define _bsd_off_t off_t