Add support for FreeBSD 6.
diff --git a/Lib/plat-freebsd6/regen b/Lib/plat-freebsd6/regen
new file mode 100644
index 0000000..8aa6898
--- /dev/null
+++ b/Lib/plat-freebsd6/regen
@@ -0,0 +1,3 @@
+#! /bin/sh
+set -v
+python ../../Tools/scripts/h2py.py -i '(u_long)' /usr/include/netinet/in.h