deb: move xhc udev rule to the right place

Lintian reminds us that udev rules belong in /lib/udev/rules.d.
French doc update: clarify comp's usage of count and names
:

Signed-off-by: Francis Tisserant <tissf@free.fr>
French doc update: default spindle speed

Signed-off-by: Francis Tisserant <tissf@free.fr>
Merge remote-tracking branch 'origin/2.6'