Merge branch 'programdata-doc'

This patch should be squashed into the commit that introduces the
ProgramData config, of course.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

Documentation/git-config.txt

@@ -247,9 +247,12 @@ $GIT_DIR/config::
 	Repository specific configuration file.
 
 On Windows, as there is no central `/etc/` directory, there is yet another
-config file, intended to contain settings for *all* Git-related software
-running on the machine. Consequently, this config file takes an even lower
-precedence than the `$(prefix)/etc/gitconfig` file.
+config file (located at `$PROGRAMDATA/Git/config`), intended to contain
+settings for *all* Git-related software running on the machine. Consequently,
+this config file takes an even lower precedence than the
+`$(prefix)/etc/gitconfig` file. Typically `$PROGRAMDATA` points to
+`C:\ProgramData` (on Windows XP the equivalent in `$ALLUSERSPROFILE` is used,
+i.e. `C:\Documents and Settings\All Users\Application Data\Git\config`).
 
 If no further options are given, all reading options will read all of these
 files that are available. If the global or the system-wide configuration