libgit2/libgit2 — pull request #2746 by carlosmn (2014-12-05 19:14:51+00:00)
Title: Fix negative ignores withing ignored dirs

git has odd ideas about what is possible to negate

foo
!foo/bar

does not negate foo/bar and

foo/*
!foo/bar
!foo/baz/quux

negates foo/bar but not foo/baz/quux. Reproduce these rules in libgit2.