HEADSUP MAINTAINERS: flat upload layout

[Yaakov Selkowitz]

In order to better manage upload permissions, effective immediately, 
each and every current primary/source package has its own directory 
directly underneath $arch/release.  Those packages that were previously 
nested have been moved accordingly, for example:

x86/release/db/*
x86/release/singular/*
$arch/release/ghostscript/ghostscript-fonts-*/
$arch/release/libggi/*
$arch/release/mingw64-i686/*
$arch/release/mingw64-x86_64/*
$arch/release/octave/octave-* (those not actual subpackages of 'octave')
$arch/release/perl/perl-* (those not actual subpackages of 'perl')
$arch/release/python/python-* (those not actual subpackages of 'python')
$arch/release/SuiteSparse/*
$arch/release/TeX/*
$arch/release/unison/*
$arch/release/X11/*

So please remember when you upload from now on, all packages go straight 
into $arch/release/.

Thanks,

Yaakov