(list-diary-entries): Adapt for new behaviour of `calendar-day-name'

(list-diary-entries): Adapt for new behaviour of `calendar-day-name'
and `calendar-month-name' functions.
(diary-name-pattern): Use abbrev arrays, rather than fixing abbrevs at
three chars.  Calling syntax change.
(mark-diary-entries):  Adapt for new behaviours of
`diary-name-pattern' and `calendar-make-alist' functions.
(fancy-diary-font-lock-keywords): Adapt for new behaviour of
`diary-name-pattern' function.
(font-lock-diary-date-forms): Use abbrev arrays, rather than fixing
abbrevs at three chars.  Calling syntax change.
(cal-hebrew, cal-islam): Require when compiling.
(diary-font-lock-keywords): Adapt for new behaviour of
`font-lock-diary-date-forms' function.