[ticket/11324] PHP 5.5 is in RC stage. No longer allow failure on travis.

PHPBB3-11324
Merge pull request #1396 from bantu/ticket/11324

[ticket/11324] PHP 5.5 is in RC state. No longer allow failure on travis...
[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...
[ticket/11540] Add unit tests for is_absolute()

PHPBB3-11540
Merge remote-tracking branch 'nickvergessen/ticket/11540' into develop-olympus

* nickvergessen/ticket/11540:
  [ticket/11540] Add unit tests for is_absolute()