Log Message:
dmg2img: Update to 1.6.7.

pkgsrc changes:

- OpenSSL 1.1 support.

Upstream changes:

dmg2img-1.6.7:
09 February 2017 Peter Wu
    Fixed buffer underrun
    Avoid truncating .img file when run to list partition

dmg2img-1.6.6:
06 February 2017 Peter Wu
    Fixed a crash on invalid block signature