Not supported by php 7

[martinvivek]

in PHP 7 the following error occurs.

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; date_iterator has a deprecated constructor in mod\tracker\locallib.php on line 1858

[vfremaux]

Processed

[drachels]

Thought I had a fix, but discovered it needs more testing.

[drachels]

Sorry to take so long to get back to this. Even though the debugging output points to locallib.php line 1858, the line that actually needs to be changed is 1864.
Right now it is: function date_iterator($year, $month) {
but it needs to be changed to: function date_iterator_constructor($year, $month) {

The change is needed for PHP 7 compatibility.