util.copyfiles: don't try os_link() again if it failed before If the os_link() call on the first file in the directory fails [1], we switch mode to using shutil.copy() for all remaining files. [1] happens for example on Windows for every file when cloning from a UNC path without specifying --pull.

cmdutil: cleanup imports

make transactions work on non-refcounted python implementations

mq: support multiple patch queues using qqueue

Merge with stable

status: avoid performance regression when no .hgsub is present (introduced by 24ce8f0c0a39)

doc: document expansion of %include and ui.username

ui.username(): expand environment variables in username configuration value. note: expansion of config variables must be handled on a case-by-case basis because they can contain arbitrary data that may not be desirable to expand.

config: expand hgrc %include paths

rename: make --after work if source is already in R state I routinely want to use `hg addrem` and then fix up missed renames manually using `hg mv -A`. This patch allows me to record such renames from a source in state R to a target in state A.

Merge with stable

doc: clarify that sections can be split

doc: clarify that keys can be overridden

commands: document --new-branch flag for push

Merge with stable

commands: updates to push docstring. With contributions from mg, hstuart, timeless, and vsh.