merge: use intersectmatchers() in "m2-vs-ma optimization" It doesn't seem like this can actually happen, but seems like cleaner anyway.

match: handle includes using new intersectionmatcher

match: move entire uipath() implementation to basematcher Even though most matchers will always want to use the relative path in uipath(), when we add support for intersecting matcher, we will want to control which form to use for any kind of matcher without knowing the type (see next patch), so we need the implementation on the base class. Also rename the attribute from "pathrestricted" to "relativeuipath" since there actually are cases where we match everything but still use relative paths (like when the user runs "hg files .." from inside mercurial/).

local-clone: also copy tags related caches This caches provide a large speedup for some repositories. Keeping it around is valuable.

local-clone: also copy revs-branch-cache files This cache provides a large speedup for some repositories. Keeping it around is valuable.

local-clone: extract the listing of caches to copy Right now, the clone only copies the branchmap caches. There are multiple other valuable caches that we should copy and extensions might add their own. So we add a function to list the cache files to copy from the repository. The repository argument is unused but extensions will want it.

local-clone: extract the closure copying caches Closures often get on the way. They are not much value in having that as a closure so I'm extracting it at the module level.