Merge branch 'PR/env-whitelist' of github.com:karelzak/util-linux-work

* 'PR/env-whitelist' of github.com:karelzak/util-linux-work:
  login: add LOGIN_ENV_SAFELIST /etc/login.def item
  su: use lib/env.c for --whitelist-environment
  env: add env_list_add_getenv() and env_list_add_getenvs()
  autotools: improve devel-non-docs config-gen scenario
  env: cleanup env_list API
  env: add "overwrite" argument to env_list_setenv()
  env: save parsed variables into ul_env_list
  tests: add su --whitelist-environment test

diff --cc text-utils/more.c
Simple merge