tests: use `hello` not `capabilities` over ssh Differential Revision: https://phab.mercurial-scm.org/D2195

narrowwirepeer: add TODO about how we add wireproto args to unbundle :( Differential Revision: https://phab.mercurial-scm.org/D2194

narrowwirepeer: rename expandnarrow capability to exp-expandnarrow The expandnarrow functionality lets a client have a shorthand (for Google it's a reference to a checked-in file) for a set of includes and excludes. For testing we should probably implement a simple version of that functionality here. For now, rename the capability so we don't burn the good name in the future if we need to change behavior. It's plausible that this functionality should be dropped from the narrowhg we ship long-term, but I'm dubious as it seems pretty likely other organizations will want similar shorthands for commonly-used subsets of their trees. Differential Revision: https://phab.mercurial-scm.org/D2193

narrow: make restrictpatterns a little more idiomatic I'm not sure why invalid_includes was an out-param, but it doesn't look like there's any reason for it to be now. Differential Revision: https://phab.mercurial-scm.org/D2192

narrowspec: consistently use set() to copy sets Differential Revision: https://phab.mercurial-scm.org/D2191

narrowspec: document constraints when validating patterns Differential Revision: https://phab.mercurial-scm.org/D2190