sshpeer: add support for request tracing The new 'devel.debug.peer-request' option now also display some information about request going through ssh peer.

httppeer: add support for tracing all http request made by the peer This changeset introduces a new 'devel.debug.peer-request' config. When set to True, debug message about request made by peer will be issued. This help to understand what actually happens during an exchange and tracks source of performance loss. This changeset implement support for http peer only.

httppeer: move url opening in its own method This will help adding debugging logic to request opening when investigating Mercurial performance.

http: add a debug version of the push test This will be useful to test further debugging capabilities in coming changesets.

lfs: raise an error if the server sends an unsolicited oid This shouldn't happen. But we shouldn't ignore it if it does, because something else is likely to go wrong.

lfs: correct documentation typo

test-convert-svn-move: sort svn checkout output It turns out that there's no guarantee in which order svn will traverse a directory while performing a checkout. Sorting the output will make these tests stable.

fileset: do not crash by unary negate operation Backported from minifileset.py.

fileset: make it robust for bad function calls Before, it could crash or show cryptic message.

log: build follow-log filematcher at once We no longer need to replay copy tracing to build filematcher as we can walk (rev, fctxs) pairs.