mail: use standard section.entry format in error message

color: accept usual boolean values as synonyms for always and never

parsebool: accept always as true and never as false

parsebool: create new function and use it for config parsing

util: clean up trailing whitespace

Consistently import foo as foomod when foo to avoid shadowing This is in the style of 5f091fc1bab7.

Merge with stable

help: refer to user configuration file more consistently Currently, a number of commands and help topics mention the user hgrc file in different ways. Among these are following: 1. .hgrc - "please specify your commit editor/username in your .hgrc file", bookmarks, color, hgk, pager, hg help environment 2. $HOME/.hgrc - hg help paths, hgrc(5), hg(1) 3. ~/.hgrc - hgrc(5) In addition to being inconsistent, none of these make sense on Windows. This patch replaces the above with a more general term of "[your] configuration file".