BUILD: makefile: Update feature flags for FreeBSD

This updates the feature flags for FreeBSD.

FreeBSD 10 adds support for accept4().

Enable getaddrinfo().

From the FreeBSD port / package.
diff --git a/Makefile b/Makefile
index 197126d..b18a731 100644
--- a/Makefile
+++ b/Makefile
@@ -363,11 +363,11 @@
   TARGET_LDFLAGS = -lnsl -lsocket
 endif
 
-# FreeBSD 5 and above
+# FreeBSD 10 and above
 ifeq ($(TARGET),freebsd)
   set_target_defaults = $(call default_opts, \
     USE_POLL USE_TPROXY USE_LIBCRYPT USE_THREAD USE_CPU_AFFINITY USE_KQUEUE   \
-    USE_CLOSEFROM)
+    USE_ACCEPT4 USE_CLOSEFROM USE_GETADDRINFO)
 endif
 
 # Mac OS/X