The port is marked broken because it couldn't find the distfile. The distfile was actually renamed from lzf-1.6.2.tgz to LZF-1.6.2.tgz. Also, the latest version is 1.6.3.
A commit references this bug:
Date: Wed Apr 29 06:42:52 UTC 2015
New revision: 384965
1: Upgrade to 1.6.3.
2: remove BROKEN.
3: change distname.
Submitted by: firstname.lastname@example.org