mktree: remove entries when mode is 0 #25

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10 errors

failed: t1010.2 ls-tree piped to mktree (1)

failed: t1010.3 ls-tree piped to mktree (2)

failed: t1010.4 ls-tree output in wrong order given to mktree (1)

failed: t1010.5 ls-tree output in wrong order given to mktree (2)

failed: t1010.6 --batch creates multiple trees

failed: t1010.7 allow missing object with --missing

failed: t1010.8 mktree with invalid submodule OIDs

failed: t1010.9 mktree reads ls-tree -r output (1)

failed: t1010.10 mktree reads ls-tree -r output (2)

failed: t1010.11 mktree de-duplicates files inside directories