The snd_config_expand functions expands the runtime contents (@func...).
Removed the environment variable replace code from the configuration parser.
Updated the alsa.conf configuration file.
The configuration root (snd_config) can be specified for the internal routines.
The pcm_hooks code was recoded (independent code moved to control/setup.c).
Improved the pcm_multi plugin (added master configuration).
Improved the variable substitution (all references in a string are replaced).
Added special redirect loading code (to separate card dependant code to
single files).
