shelve: check the actual shelvestate in morestatus The rebasestate is a lower level implementation details that we are trying to remove. Differential Revision: https://phab.mercurial-scm.org/D3687

packaging: dynamically define make targets We currently have make boilerplate for each instance of a distro's release. This is redundant, annoying to maintain, and prone to errors. This commit defines variables holding available releases for various distros. We then iterate through the list and dynamically define make targets. Differential Revision: https://phab.mercurial-scm.org/D3761