The Sources writer copies each Checksums block from the .dsc, adds a
line for the .dsc itself, and computes blocks for algorithms the .dsc
lacks. Add SHA3-256 and SHA3-512 to each of those paths, so with SHA3
enabled a source package gets SHA3 checksums whether or not dpkg
wrote them, and so disabling either algorithm removes its block as
for the others. With SHA3 left off, which is the default, the blocks
are dropped even when the .dsc carries them.
Document the new checksum names in the apt-ftparchive manual page.
Gianpiero Carpinelli
66bc6301d7