* lisp/calendar/cal-html.el: (cal-html-holidays): New option.
(cal-html-css-default): Add holiday entry.
(holiday-in-range): Autoload it.
(cal-html-htmlify-entry): Add optional class argument.
(cal-html-htmlify-list): Add optional holidays argument.
(cal-html-insert-agenda-days): Include holidays in the output.
(cal-html-one-month): Maybe include holidays.
* lisp/calendar/calendar.el (calendar-customized-p): New function.
(calendar-abbrev-construct, calendar-make-alist): Change what it does.
(calendar-day-name-array, calendar-month-name-array): Doc fix.
Add :set function.
(calendar-abbrev-length, calendar-day-abbrev-array)
(calendar-month-abbrev-array): Make defcustoms, with appropriate :set.
(calendar-day-abbrev-array, calendar-month-abbrev-array):
Elements may no longer be nil.
(calendar-day-name, calendar-month-name):
Update for changed nature of abbrev arrays.
* calendar/diary-lib.el (diary-name-pattern):
Update for changed nature of abbrev arrays.
(diary-mark-entries-1): Update calendar-make-alist calls.
(diary-font-lock-date-forms): Doc fix for changed abbrev arrays.
* calendar/cal-html.el (cal-html-day-abbrev-array):
Simply inherit from calendar-day-abbrev-array.
* etc/NEWS: Mention this.
(generated-autoload-file): Don't set, instead use different values of
generate-autoload-cookie plus Makefile rules to allow for a mixture of
internal calendar autoloads and normal autoloads.
