cal_header - Displayed above monthly (tabular) calendars
    Default:  <html><head>\n<title>LowCal Calendar</title>\n</head><body>\n

cal_footer - Displayed below monthly (tabular) calendars
    Default:  </body></html>

evt_header - Displayed at the beginning of standalone event information
    Default:  <html><head>\n<title>LowCal Calendar</title>\n</head><body>\n

evt_footer - Displayed at the end of standalone event information
    Default:  </body></html>

list_header - Displayed at the top of a list of events (listdays or
              summarydays)
    Default:  <html><head>\n<title>LowCal Event List</title>\n</head><body>\n

list_day_sep - Displayed between days in a list of events
    Default:  <hr>\n<h3>%MONTH%/%DAY%/%YEAR% -</h3>\n

list_evt_sep - Displayed between events on the same day in a list of events
               with event details included  (i.e., listdays uses this,
               summarydays does not)
    Default:  <hr width=50%>\n

list_footer - Displayed at the bottom of a list of events
    Default:  <hr>\n</body></html>

evt-* - Any file whose name begins with the prefix "evt-" will be considered
        to be a generic (not tied to a specific date) event listing and will
        be checked for a <meta repeat="..."> tag whenever lowcal-update.pl
        (or Apache::LowCal::CalCron::fill_month) is invoked.  Token
        substitutions will not be performed at this time.

YYYYMMDD* - Any file whose name begins with a date in the format YYYYMMDD,
            which may be followed by any suffix (including none) will be
            identified as an event for that date and, although it is
            technically not a template, it is parsed and token substitutions
            are performed identically to template handling.

