* 'feat/add_json_opt_lslogins' of https://github.com/cgoesche/util-linux-fork:
bash-completion: (lslogins) add --list-columns option
lslogins: (man) add --list-columns description
lslogins: add -H and --list-columns option; declutter --help output
lslogins: (man) add --json information
bash-completion: (lslogins) add --json completion
tests: (lslogins) test --json output mode
lslogins: add JSON output format mode