(calendar-coptic-month-name-array): Rename coptic-calendar-month-name-array.

(calendar-coptic-month-name-array): Rename coptic-calendar-month-name-array.
Update callers.
(calendar-coptic-epoch): Rename coptic-calendar-epoch.  Update callers.
(calendar-coptic-name): Rename coptic-name.  Update callers.
(calendar-coptic-leap-year-p): Rename coptic-calendar-leap-year-p.
Update callers.
(calendar-coptic-last-day-of-month): Rename coptic-calendar-last-day-of-month.
Update callers.
(calendar-coptic-to-absolute): Rename calendar-absolute-from-coptic.
Keep old name as alias, update callers.
(calendar-coptic-print-date): Rename calendar-print-coptic-date.
Keep old name as alias, update callers.
(calendar-coptic-goto-date): Rename calendar-goto-coptic-date.
Keep old name as alias, update callers.
(calendar-ethiopic-month-name-array): Rename ethiopic-calendar-month-name-array.
Update callers.
(calendar-ethiopic-epoch): Rename ethiopic-calendar-epoch.  Update callers.
(calendar-ethiopic-name): Rename ethiopic-name.  Update callers.
(calendar-ethiopic-to-absolute): Rename calendar-absolute-from-ethiopic.
Keep old name as alias, update callers.
(calendar-ethiopic-print-date): Rename calendar-print-ethiopic-date.
Keep old name as alias, update callers.
(calendar-ethiopic-goto-date): Rename calendar-goto-ethiopic-date.
Keep old name as alias, update callers.