ports/170417: Update port: sysutils/grub2 to 2.00

http://people.freebsd.org/~nox/tmp/grub-2.00-008.zfs.patch has been applied.
the patch for Makefile was rejected and applied by hand.
Merge branch 'reallyenglish' into mitsuruy
sed does not support "\t"
bugfix: endianess problem in tftp.c; import from bzr repo.

revno: 4548
committer: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
branch nick: grub
timestamp: Mon 2012-07-02 11:22:50 +0200
message:
        * grub-core/net/tftp.c (ack): Fix endianness problem.
        (tftp_receive): Likewise.
        Reported by: Michael Davidsaver.
bugfix: import from the bzr repo: Fix double increment.

revno: 4596
author: Paulo Flabiano Smorigo  <pfsmorigo@br.ibm.com>
committer: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
branch nick: grub
timestamp: Wed 2012-11-28 14:14:20 +0100
message:
        * grub-core/net/bootp.c (parse_dhcp_vendor): Fix double increment.
Merge pull request #73 from reallyenglish/mitsuruy

update sysutils/grub2 to 2.00 and import some patches from upstream