It looks the the symlink /usr/bin/perl (to /usr/local/bin/perl) has
been removed at least on FreeBSD 10.3. See [1] for more information.

[1] https://svnweb.freebsd.org/ports/head/UPDATING?r1=386270&r2=386269&pathrev=386270&diff_format=cSigned-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com>
Helped-by: NEric Wong <e@80x24.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>