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

* 'PR/add_ul_prefix' of https://github.com/karelzak/util-linux-work:
  treewide: add ul_ to parse_timestamp() function name
  treewide: add ul_ to parse_switch() function name
  treewide: add ul_ to parse_size() function name
  treewide: add ul_  to parse_range() function name