[ticket/11816] Fix define/loop checks in IF statements containing parenthesis

PHPBB3-11816
[ticket/11816] Test !$DEFINITION

PHPBB3-11816
[ticket/11816] !$DOESNT_EXIST test

PHPBB3-11816
Merge branch 'develop' of github.com:phpbb/phpbb3 into ticket/11816

# By David King (16) and others
# Via David King (13) and others
* 'develop' of github.com:phpbb/phpbb3: (67 commits)
  [ticket/11825] Move schema_data.php into includes/ instead of phpbb/
  [ticket/11215] Remove unnecessary comment
  [ticket/11755] MySQL upgrader out of date
  [prep-release-3.0.12] Update Changelog for 3.0.12-RC3 release.
  [prep-release-3.0.12] Bumping version number for 3.0.12-RC3.
  [ticket/11823] Set up nginx server to match PHP files with characters after .php
  [ticket/11812] Fix empty define
  [ticket/11818] Update Symfony dependencies to 2.3.*
  [ticket/11791] Load adm/ events from styles/adm/event/
  [ticket/11215] Fix helper_url_test.php tests
  [ticket/11215] Add newline back to .htaccess, fix wording
  [ticket/11215] Update comment in .htaccess
  [ticket/11215] Uncomment rewrite rules in .htaccess
  [ticket/11215] Make controller helper url() method use correct format
  [ticket/11215] Add commented-out URL rewrite capability to .htaccess
  [ticket/11821] Fix comma usage next to "You are receiving this notification".
  [ticket/11769] Allow using 0 as poster name
  [ticket/11769] Allow '0' as username
  [ticket/11215] Use new URL structure for controllers
  [ticket/11215] Everything appears to be working...
  ...

Conflicts:
	phpBB/phpbb/template/twig/lexer.php
	tests/template/template_test.php
Merge branch 'develop' of github.com:phpbb/phpbb3 into ticket/11816

# By Joseph Warner (187) and others
# Via Nathan Guse (6) and others
* 'develop' of github.com:phpbb/phpbb3: (195 commits)
  [ticket/11828] Fix greedy operators in lexer
  [ticket/11835] Fix ucp_auth_link adding in migration
  [prep-release-3.0.12] Remove changelog entry for ticket that was not resolved.
  [ticket/develop/11832] Fix path detection
  [feature/oauth] Fix tabindex
  [ticket/9550] Add the core.viewtopic_post_rowset_data event to viewtopic.php
  [ticket/11829] Use report_closed to determine status in MCP report_details
  [feature/oauth] Fix bug on ucp_auth_link related to error display
  [feature/oauth] More small fixes
  [feature/oauth] More minor changes from review
  [feature/oauth] Fix small bug introduced by update in OAuth library
  [feature/oauth] Fix small issues on ucp pages
  [feature/oauth] Fix typo in OAuth logout method
  [feature/oauth] Make token storage service ignorant
  [feature/oauth] Update oauth::logout() to use clearAllTokens()
  [feature/oauth] Update storage implementation due to inteface change
  [feature/oauth] Update lusitanian/oauth to stable branch
  [ticket/11822] Use namespace lookup order for asset loading
  [feature/oauth] Update comment on oauth service exception
  [feature/oauth] Forgot to remove placeholder comment
  ...

Conflicts:
	phpBB/phpbb/template/twig/lexer.php
	tests/template/template_test.php
Merge pull request #1683 from EXreaction/ticket/11816

[ticket/11816] Fix define/loop checks in IF statements containing parenthesis