[RFD PATCH 0/2] How to migrate our test infrastructure away from sha1

Brian got the ball rolling with his object-id patches
to fixup the code base, but we also need to discuss how
we approach our test infrastructure eventually.

C.f.:
* jb/t8008-cleanup (2017-07-26) 1 commit
 - t8008: rely on rev-parse'd HEAD instead of sha1 value
* sb/t4005-modernize (Remove hard coded sha1 values.)

This presents an alternative approach in the second patch,
which just marks tests as "SHA1" required instead of making
the test hash-agnostic.

The first patch is just an aid to show which tests need
addressing, although there are some false positives (i.e.
the test fails for other reasons than the hash dependency,
such as corruption of data.)

Stefan 

Stefan Beller (2):
  alter hash function: expose test dependencies on sha1
  t6500: mark tests as SHA1 reliant

 sha1dc/sha1.c | 2 +-
 t/t6500-gc.sh | 6 +++---
 t/test-lib.sh | 4 ++++
 3 files changed, 8 insertions(+), 4 deletions(-)

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2.14.0.rc0.3.g6c2e499285