Loading fglrx module with --ignore-install like the nvidia ones too.
Making module loading for fglrx and nvidia not fail.

It has been observed that on some weird systems,
the graphic card is supported by fglrx or nvidia
(by having its pci-id listed in the drivers own
pci-id list), yet the driver fails to initialize
the card (shown by a 'device is busy' message).

In such cases, we need to not error-out of live-config
and continue as normal, then, xorg takes care about this
automatically loads the next best suitable driver.
Releasing debian version 3.0.23-1.
Always configure X server

As a live system is intended to be run in various different hardware
configurations, the X server configuration should be adjusted at each
boot and not only once the first time this live-config script is run.
Use xorg driver for multiple display controllers

Using anything other than native xorg drivers  has (so far) failed on
all systems with multiple display controllers. Use xorg autodetection in
this case instead of prorietary drivers.

This also moves the X11 driver detection into a subfunction to avoid yet
another giant if block.
Fix NVIDIA legacy driver configuration

The glx alternative has to be set after the nvidia alternative to ensure
that all links are present.
Fix passing of NVIDIA driver variant from Detect_xorg_driver.
Adapt names for Nvidia config files
Change nvidia-legacy-173xx.conf from symlink to file
Detection for controllers with the same PCI ID

If more than one display controller is detected, fall back to xorg
autodetection unless these controllers have the same PCI ID.
Configurations with two different cards are not supported by anything
other than xorg drivers, but some cards present two devices with the
same ID. At least some of these are supported by the proprietary NVIDIA
driver.
Avoid unnecessary reconfigureing glx-alternative-nvidia

Reconfigureing the package is needed after changing the alternative, but
takes some time. This only reconfigures the package if the alternative
needs to be changed.