help/config: back out 5f2a1ebd6e78 This breaks building manpages, and by association breaks building debs. timeless has a fix coming, but it turns out we'll need to back out 5f2a1ebd6e78 anyway, so just back it out now to fix building packages.

filemerge: add non-interactive :merge-local and :merge-other There are two non-interactive internal merge tools, :other and :local, but they don't really merge, they just pick all changes from the local or other version of the file. In some situations, it is known that we want a merge and also know that all merge conflicts should be resolved in one direction. Although external merge tools can do this, sometimes it can be convenient to do so from within hg, without invoking a merge tool. These new :merge-local and :merge-other tools can do just that.

simplemerge: enable option to resolve conflicts one way With this change, the simplemerge algorithm grows an option to only return the local or the other hunk in a conflicting region.

templater: add new docheader/footer components for XML (issue4135) The existing header/footer components were templated per-changeset, and thus couldn't be correctly printed for an empty log

import-checker: use modern .endswith for multiple suffixes Suggested by Anton Shestakov <engored@ya.ru> on the list. Thanks!

hgweb: use separate repo instances per thread Before this change, multiple threads/requests could share a localrepository instance. This meant that all of localrepository needed to be thread safe. Many bugs have been reported telling us that localrepository isn't actually thread safe. While making localrepository thread safe is a noble cause, it is a lot of work. And there is little gain from doing so. Due to Python's GIL, only 1 thread may be processing Python code at a time. The benefits to multi-threaded servers are marginal. Thread safety would be a lot of work for little gain. So, we're not going to even attempt it. This patch establishes a pool of repos in hgweb. When a request arrives, we obtain the most recently used repository from the pool or create a new one if none is available. When the request has finished, we put that repo back in the pool. We start with a pool size of 1. For servers using a single thread, the pool will only ever be of size 1. For multi-threaded servers, the pool size will grow to the max number of simultaneous requests the server processes. No logic for pruning the pool has been implemented. We assume server operators either limit the number of threads to something they can handle or restart the Mercurial process after a certain amount of requests or time has passed.