[Module::Build] .modulebuildrc documentation out of sync with code

[David G. <da...@hy...>]

I posted this to RT, but I'll copy here as well:

Documentation for the location of .modulebuildrc says .modulebuildrc 
should be placed in $ENV{HOME}, but the code actually searches the 
following environment variables: APPDATA HOME USERPROFILE WINDIR SYS$LOGIN.

This is particularly confusing because HOME isn't listed first, so a
.modulebuildrc file place in $ENV{HOME} just mysteriously fails to work
on Win32 where $ENV{APPDATA} exists.