The configuration file is line-oriented.
Blank lines and whitespace at the beginning and end of a line are ignored.
Comments start with ``#`` or ``%`` in the first column
(after any beginning-of-line whitespace) and go to the end of the line.

The file is split into sections.
Every section begins with “[SECTIONNAME]” and
contains a number of options of the form “OPTION=VALUE”.
There may be whitespace around the ``=`` (equal sign).
Section names and options are *case-insensitive*.

The values, however, are *case-sensitive*.
In particular, boolean values are one of ``YES`` or ``NO``.
Values can include whitespace by surrounding
the entire value with ``"`` (double quote).
Note, however, that there are no escape characters in such strings;
all characters between the double quotes (including other double quotes)
are taken verbatim.

Values that represent filenames can begin with a ``/bin/sh``-like
variable reference.
This can be simple, such as ``$TMPDIR/foo``, or complex,
such as ``${TMPDIR:-${TMP:-/tmp}}/foo``.
See ``[PATHS]`` (below).

Values that represent a time duration are represented as a series
of one or more ``NUMBER UNIT`` pairs, e.g. ``60 s``, ``4 weeks 1 day``,
``5 years 2 minutes``.

Values that represent an amount are in the usual amount syntax:
``CURRENCY:VALUE.FRACTION``, e.g. ``EUR:1.50``.
The ``FRACTION`` portion may extend up to 8 places.