[ticket/11105] Added spaces between ; and "url=" to adhere to w3c conventions.

There was no space between ; and the string "url=". But according to w3c, we
should have atleast one space between them. So, added space characters
accordingly.

PHPBB3-11105
Merge pull request #1403 from bantu/ticket/11105

[ticket/11105] Add mandatory space to content part of meta http-equiv=re...