-TIP: The long options may be abbreviated, as long as the abbreviation is not
-ambiguous. Eg. '--k' will be the same as '--keep_src_list', and '--pac' be
-'--packages'.
-
-[WARNING]
-=====================================================================
-
-- To specify the optional parameter for switches that accept them, the
-optional argument must be written directly after the long option name,
-separated by `=' (without space).
-
-- the commandline parsing of grml-debootstrap does not validate the provided