Merge branch 'PR/Benno-2Jun' of https://github.com/karelzak/util-linux-work

* 'PR/Benno-2Jun' of https://github.com/karelzak/util-linux-work:
  treewide: replace postal address in license specifier with a terse URL
  docs: stop the copyright verbiage from getting included in the POT file
  docs: make the "po4a:" line the first line, like in all other .adoc files
  correct the full name of the GPL in various files
  remove "Copyright (C) ...." notes from files that claim no copyright
  remove two leftover license lines from colors.{c,h}