[ticket/12937] Do not return false. Return null for get and array() for all.

PHPBB3-12937
[ticket/security-155] Cast the types of string values in the controller routes

SECURITY-155
Merge remote-tracking branch 'github-bantu/ticket/12937' into develop-ascraeus

* github-bantu/ticket/12937:
  [ticket/12937] Do not return false. Return null for get and array() for all.
[ticket/security-155] Fix spelling error in comment

SECURITY-155
Merge pull request #2841 from nickvergessen/ticket/security-155

[ticket/security-155] Cast the types of string values in the controller routes
Merge pull request #2724 from VSEphpbb/ticket/12841

[ticket/12841] Allow extensions to position new config vars

* VSEphpbb/ticket/12841:
  [ticket/12841] Make config position default to after
  [ticket/12841] Update comments in tests making after default
  [ticket/12841] prefix function name with phpbb_
  [ticket/12841] Add a tests for the new function
  [ticket/12841] Fix white space issues reported by sniffer
  [ticket/12841] Allow extensions to position new config vars