[patch] [locale] German locales use old %d.%m.%y date format instead of newer ISO...

[patch] [locale] German locales use old %d.%m.%y date format instead of newer ISO date

From the submitter:

    DIN 5008 (German norm for text processing) defines the old date
    format (%d.%m.%Y) to be obsolete and to be used only, if unambigous.
    In international communications the new format (%Y-%m-%d) is now
    required and FreeBSD should respect this.

    References:
    - DIN 5008
    - EN 28 601
    - ISO 8601

    Thanks to Oliver Lietz for bringing this to my attention.

PR:		conf/72076
Submitted by:	Peter Wullinger <some-mail-drop@gmx.net>
MFC after:	1 week