"tools" mode: Uses new "if_env_var_is_not_empty" condition now
"tools" mode: Uses new "if_env_var_is_not_empty" condition now

- A mandatory change, because the Lua mapping engine parses rules
  when a process is started, while the C mapping engine parses rules
  just once when the session is created. The old way of checking
  location of /var/lib/dpkg/status was just totally incompatible
  with the requirements of the C mapping engine.

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