Explain my matcher-list style to me :-)

[Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>]

A very long time ago I copied this matcher-list style out of a zsh-users
thread.  Unfortunately I've lost track of that thread, and there's no
good way to search archives for strings like "l:|=*".

zstyle ':completion:*' matcher-list '' 'r:|[-._,]=** r:|=**' \
    'm:{[:lower:][:upper:]}={[:upper:][:lower:]} r:|[-._,]=** r:|=**' \
    'r:|[-._,]=** r:|=** l:|=*'

I understand thee first three:

''
'r:|[-._,]=** r:|=**'
'm:{[:lower:][:upper:]}={[:upper:][:lower:]} r:|[-._,]=** r:|=**'

But I've forgotten what is gained by adding the l:|=* pattern in that
final one.  How does it differ from the second one?