Merge pull request #5465
e27d7cb docs: release process fixups (Cory Fields)
d7db4b6 depends: fix packages with hard-coded SOURCES_PATH (Cory Fields)
d546191 depends: Move source stamps to source dir and misc cleanups (Cory Fields)
422f873 depends: teach 'make download' to download sources for all hosts (Cory Fields)