configure --help should print possible values for wildcard options

[ph3-der-loewe]

configure --help currently only prints infos on the options itself but not about possible values.

Those information may be extracted at runtime directly out of the script itself.
The following command lion shows a short not yet fully working example for this and the --no-* option:

$ grep ^{test_lib_defmake configure | awk '{print $5}' | sort | uniq}