mercurial/help/config.txt

help config: update windows documentation to match implementation

This shows how confusing the current implementation is on Windows.

Mercurial reads configuration data from several files, if they exist.
Below we list the most specific file first.

On Windows, these configuration files are read:

- ``<repo>\.hg\hgrc``
- ``%USERPROFILE%\.hgrc``
- ``%USERPROFILE%\mercurial.ini``
- ``%HOME%\.hgrc``
- ``%HOME%\mercurial.ini``
- ``C:\mercurial\mercurial.ini`` (unless regkey or hgrc.d\ or mercurial.ini found)
- ``HKEY_LOCAL_MACHINE\SOFTWARE\Mercurial`` (unless hgrc.d\ or mercurial.ini found)
- ``<hg.exe-dir>\hgrc.d\*.rc`` (unless mercurial.ini found)
- ``<hg.exe-dir>\mercurial.ini``

On Unix, these files are read:

- ``<repo>/.hg/hgrc``
- ``$HOME/.hgrc``
- ``/etc/mercurial/hgrc``
- ``/etc/mercurial/hgrc.d/*.rc``
- ``<install-root>/etc/mercurial/hgrc``
- ``<install-root>/etc/mercurial/hgrc.d/*.rc``

The configuration files for Mercurial use a simple ini-file format. A
configuration file consists of sections, led by a ``[section]`` header
and followed by ``name = value`` entries::

  [ui]
  username = Firstname Lastname <[e-mail]>
  verbose = True

The above entries will be referred to as ``ui.username`` and
``ui.verbose``, respectively. Please see the hgrc man page for a full
description of the possible configuration values:

- on Unix-like systems: ``man hgrc``
- online: http://www.selenic.com/mercurial/hgrc.5.html