[ticket/13376] Revert unnecessary change for cookies called GLOBALS 92f554e3

Also introduce a clear cookie message hardcoded just in case.

PHPBB3-13376
Merge pull request #3180 from naderman/ticket/13376

[ticket/13376] Revert unnecessary change for cookies called GLOBALS 92f554e3
[ticket/11613] Allow cookies to work on netbios domains

PHPBB3-11613
Merge pull request #3188 from marc1706/ticket/11613

[ticket/11613] Allow cookies for domains without dots

* marc1706/ticket/11613:
  [ticket/11613] Allow cookies to work on netbios domains