Merge branch 'kb/use-nsec-doc'

Clarify in the Makefile a guideline to decide use of USE_NSEC. * kb/use-nsec-doc: Makefile / racy-git.txt: clarify USE_NSEC prerequisites

Junio C Hamano committed Jul 13, 2015 at 14:00 UTC 43f23b09bffed2ab8852725e26f746d1f762cc85

No changes.