Use gmake on Darwin, bmake doesn't like the codesign / POSTLINK bits.
Update to 0.7.0, fixing a security issue.

2014-06-16: 0.7.0 "Kryoptonite"
	- Partial IPv6 support (#107)
	   Client can connect to iodined through an relaying IPv6
	   nameserver. Server only supports IPv4 for now.
	   Traffic inside tunnel is IPv4.
	- Add socket activation for systemd, by Michael Scherer.
	- Add automated lookup of external ip (via -n auto).
	- Bugfix for OS X (Can't assign requested address)
	- Fix DNS tunneling bug caused by uninitialized variable, #94
	- Handle spaces when entering password interactively, fixes #93.
		Patch by Hagar.
	- Add -R option to set OpenBSD routing domain for the DNS socket.
		Patch by laurent at gouloum fr, fixes #95.
	- Add android patches and makefile, from Marcel Bokhorst, fixes #105.
	- Added missing break in iodine.c, by Pavel Pergamenshchik, #108.
	- A number of minor patches from Frank Denis, Gregor Herrmann and
		Barak A. Pearlmutter.
	- Testcase compilation fixes for OS X and FreeBSD
	- Do not let sockets be inherited by sub-processes, fixes #99.
	- Add unspecified RR type (called PRIVATE; id 65399, in private use
		range). For servers with RFC3597 support. Fixes #97.
	- Fix authentication bypass vulnerability; found by Oscar Reparaz.
Updated net/iodine to 0.7.0
Treat FreeBSD as NetBSD, it uses NetBSD's libexecinfo.
This fixes the build on FreeBSD 10.
Create more symbolic links to fix build on FreeBSD 10.
No "ulong" type on FreeBSD 10.
Define "__u32" and "__u64" for FreeBSD to make the package build on FreeBSD 10.
FreeBSD 10 lacks "versionsort" too.
FreeBSD doesn't have libmalloc.
This fixes the build on FreeBSD 10.
FreeBSD doesn't have "alloca.h".
This fixes the build on FreeBSD 10.
FreeBSD's unzip doesn't handle the distfile.
This fixes the build on FreeBSD 10.
FreeBSD 10 is not FreeBSD 1.
<stdint.h> is needed to make it build on FreeBSD.
Don't build bundled implementation of "mktime" on NetBSD.
This makes the package build on 32-bit NetBSD.
Patch is taken from devel/blame that carries the same "mktime" implementation.