Andrew Kelley eeadd55d15 fix tools/process_headers.zig regression
When upgrading to the new std lib HashMap API, the process_headers code
regressed because something that was supposed to be a pointer ended up
being a copy of a value. This resulted in the modification of a field
not being picked up.

Also switch from Sha256 to Blake3 while we're at it.
2020-08-30 21:24:41 -07:00
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