#68268: DatePeriod: Getter for start date, end date and interval
Merge branch 'pull-request/878'

* pull-request/878:
  #68268: DatePeriod: Getter for start date, end date and interval
Conflicts:
	ext/date/php_date.c
Merge branch 'PHP-5.6'

* PHP-5.6:
  Conflicts: 	ext/date/php_date.c

Conflicts:
	ext/date/php_date.c