wireproto: split streamres into legacy and modern case A couple of commands currently require transmission of uncompressed frames with the old MIME type. Split this case from streamres into a new streamres_legacy class. Streamline the remaining code accordingly. Add a new flag to streamres to request uncompressed streams. This is useful for sending data that is already compressed like a pre-built bundle. Expect clients to support uncompressed data. For older clients, zlib will still be used. Differential Revision: https://phab.mercurial-scm.org/D1862

localrepo: run cache-warming transaction callback before report callback See in-code comment for details. Differential Revision: https://phab.mercurial-scm.org/D1918

scmutil: 0-pad transaction report callback category Before this patch, the transaction name was '%2i-txnreport', which means the first one would be ' 0-txnreport'. It seems more intuitive for sorting purposes (the callbacks are called in lexicographical order) to make it 0-padded. Differential Revision: https://phab.mercurial-scm.org/D1917