Git 2.20.5

1. 033abf9 Replace all die("BUG: ...") calls by BUG() ones by Johannes Schindelin · 8 years ago
2. 0d4a132 object-store: migrate alternates struct and functions from cache.h by Stefan Beller · 8 years ago
3. aae2ae4 tmp-objdir: quote paths we add to alternates by Jeff King · 9 years ago
4. 62fe0eb tmp-objdir: do not migrate files starting with '.' by Jeff King · 9 years ago
5. e34c2e0 tmp-objdir: put quarantine information in the environment by Jeff King · 9 years ago
6. 2564d99 tmp-objdir: introduce API for temporary object directories by Jeff King · 9 years ago