Rework a little bit of the LAN mirror and proxy settings.

/trunk/scripts/crosstool.sh | 105 4 101 0 +------------------------
/trunk/scripts/functions | 151 129 22 0 +++++++++++++++++++++++++++++++-----
/trunk/config/global/download.in | 193 99 94 0 ++++++++++++++++++++++++----------------------
3 files changed, 232 insertions(+), 217 deletions(-)

# x86_64 specific options

config ARCH_x86_64

    select ARCH_SUPPORT_ARCH

    select ARCH_SUPPORT_CPU

    select ARCH_SUPPORT_TUNE

    help

      The x86_64 architecture, as defined by:

        http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_875_7044,00.html