Bug#685955: Enable as default

[Steve Clark]

The example in /usr/share/doc/libasound2-plugin-equal/examples and the
example given in /usr/share/doc/libasound2-plugin-equal/README will
only work by specifying the plugin. If the plugin is not specified or
the app cannot be configured as such, then this approach may produce
silence.

I would like to suggest the following as a working example that enables
the plugin as default:

ctl.equal {
 type equal;
}

pcm.plugequal {
 type equal;
 # Modify the line below if you don't
 # want to use sound card 0.
 slave.pcm "plughw:0,0";
 # or if you want to use with multiple applications output to dmix
 #slave.pcm "plug:dmix"
}

#pcm.equal {
 # Or if you want the equalizer to be your
 # default soundcard uncomment the following
 # line and comment the above line.
pcm.!default {
 type plug;
 slave.pcm plugequal;
}