hgweb: drop support for "manifest" parameter AFAICT (but note that this is the first time I look at hgweb code), the "mercurial" query parameter was removed from rendered pages in 36fa5db79dd5 (hgweb: convert gitweb to NWI, 2006-10-05). Search for "manifest=" in that diff to see why I think it was removed. It's about time we stop looking for the parameter in requests. Differential Revision: https://phab.mercurial-scm.org/D3073

rebase: use single transaction when running in memory rebase.singletransaction make rebase noticeably faster (~20% in a test I just ran). It is not enabled by default because it risks losing information if it aborts (see `hg help rebase`). When running rebase with the experimental in-memory option on, rebase is first attempted in memory, and if any conflicts occur, it restarts, this time writing to disk. Thus, it should be safe to turn on single-transaction mode for the in-memory phase. Differential Revision: https://phab.mercurial-scm.org/D3076

bundlerepo: use super() when calling file() We should be calling the default method, not reimplementing it. Differential Revision: https://phab.mercurial-scm.org/D3058