Ответ: CONFIG

[Vladimir Dronnikov]

What is wrong with quite straightforward approach of handling
sections? It compiles out cleanly if we do not need it. But it's OK.

BTW, IMO PARSE_ESCAPE should be revived (in man 5 fstab it is stated
that \040 is a valid escape in mountpoint field). This can solve dirt
cheap the problem of specifying tokens which internally contain
characters that are normally treated as delimiters/comment-chars.

--
Vladimir