Bug#766763: Support @annually

[Alexandre Detiste]

control: tags fixed-upstream

> Package: systemd-cron
> Version: 1.3.1+ds1-1
> Severity: wishlist
> 
> Just for consistency with Vixie's crontab extensions, @annually should also be
> supported.
> 

@annually is already supported since July ;
https://github.com/kstep/systemd-crontab-generator/issues/5

though it seems there is a typo in systemd itself:
http://cgit.freedesktop.org/systemd/systemd/tree/src/shared/calendarspec.c

http://en.wiktionary.org/wiki/annually

As a workaround, both "annually" & "anually" are now translated in "yearly"
https://github.com/systemd-cron/systemd-cron/commit/968add19ca19178d7b2bc1af4b67f018f8178ef5

I filled a bug against systemd.
https://bugs.freedesktop.org/show_bug.cgi?id=85447