omparisons to be handled in a case-insensitive manner.
<P><DT><A NAME="M9"><B>-matchvar</B> <I>varName</I></A><DD>
This option (only legal when <B>-regexp</B> is also specified)
specifies the name of a variable into which the list of matches
found by the regular expression engine will be written.  The first
element of the list written will be the overall substring of the input
string (i.e. the <I>string</I> argument to <B>switch</B>) matched, the
second element of the list will be the substring matched by t