[PATCH] udev - switch SYSFS_file to SYSFS{file}

[PATCH] udev - switch SYSFS_file to SYSFS{file}

Here we switch the configs and man pages to the new attribute syntax.
Also the 'partition trick' is mentioned in udev.8

I think it's more clear visible now, that inside the brackets are user
supplied values used and not some magic keys handled:

  'SYSFS_dev' is now 'SYSFS{dev}'

The old syntax is still supported.