Update GPL text to include current FSF address etc.

There are also some whitespace changes, and the full name of the
LGPL is updated.

Suggested-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Spelling fixes.

Signed-off-by: Ville Skyttä <ville.skytta@iki.fi>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
[bwh: Drop changes to ChangeLog and NEWS]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ethtool: fix man page for new speeds

both the 20000 and 40000 speeds either were wrong or just
not documented.  Fix both.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ethtool.8: Add missing 1G and 10G link modes, and full names for all modes

The 1G and 10G backplane link modes were missing from the table for
the 'advertise' keyword.  Most link modes had only speed and duplex
listed; change them to be consistent with ethtool's own output.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Update my address in AUTHORS

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Release version 3.13.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>