[ticket/13268] Properly append ternary result in get_existing_indexes()

PHPBB3-13268
[ticket/13248] Use auth provider collection for getting provider

PHPBB3-13248
[ticket/13248] Allow specifying different auth provider in provider collection

PHPBB3-13248
[ticket/13248] Correctly pass provider name

PHPBB3-13248
[ticket/security-164] Sanitize all global variables in symfony_request class

SECURITY-164
[ticket/security-164] Correctly format page_name

SECURITY-164
[ticket/13263] Use prosilver as default style if user's style doesn't exist

If prosilver is not installed for whatever reason, it will be installed by
the newly added migration.

PHPBB3-13263
[ticket/13263] Only install/set prosilver if no style available

Users that have a nonexistent style selectd will revert back to the default
style.

PHPBB3-13263
[ticket/13263] Make sure default style exists and clean up code

PHPBB3-13263
Merge remote-tracking branch 'github-marc1706/ticket/13263' into prep-release-3.1.1

* github-marc1706/ticket/13263:
  [ticket/13263] Make sure default style exists and clean up code
  [ticket/13263] Only install/set prosilver if no style available
  [ticket/13263] Use prosilver as default style if user's style doesn't exist
[prep-release-3.1.1] Add 3.1.1 migration file
[ticket/13271] Disable CC sender feature for anonymous users

PHPBB3-13271
Merge branch 'ticket/13271' into prep-release-3.1.1

* ticket/13271:
  [ticket/13271] Disable CC sender feature for anonymous users
Merge remote-tracking branch 'github-security/ticket/security-164-alt' into prep-release-3.1.1

* github-security/ticket/security-164-alt:
  [ticket/security-164] Correctly format page_name
  [ticket/security-164] Sanitize all global variables in symfony_request class
Merge branch 'prep-release-3.1.1' into develop-ascraeus

* prep-release-3.1.1:
  [ticket/13271] Disable CC sender feature for anonymous users
  [prep-release-3.1.1] Add 3.1.1 CHANGELOG
  [prep-release-3.1.1] Add 3.1.1 migration file
  [ticket/13263] Make sure default style exists and clean up code
  [ticket/13263] Only install/set prosilver if no style available
  [ticket/13263] Use prosilver as default style if user's style doesn't exist
  [ticket/security-164] Correctly format page_name
  [ticket/security-164] Sanitize all global variables in symfony_request class
  [ticket/13248] Use functional framework login method in tests
  [ticket/13248] Correctly pass provider name
  [ticket/13248] Always use provider collection for getting provider
  [ticket/13248] Allow specifying different auth provider in provider collection
  [ticket/13248] Use auth provider collection for getting provider
  [ticket/13262] Mention htaccess file when updating from 3.0 to 3.1
  [ticket/13267] Update Automatic Update instructions to include vendor directory
  [ticket/13268] Properly append ternary result in get_existing_indexes()
  [prep-release-3.1.1] Update version number to 3.1.1

Conflicts:
	build/build.xml
	phpBB/includes/constants.php
	phpBB/install/schemas/schema_data.sql
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/13271] Disable CC sender feature for anonymous users
  [prep-release-3.1.1] Add 3.1.1 CHANGELOG
  [prep-release-3.1.1] Add 3.1.1 migration file
  [ticket/13263] Make sure default style exists and clean up code
  [ticket/13263] Only install/set prosilver if no style available
  [ticket/13263] Use prosilver as default style if user's style doesn't exist
  [ticket/security-164] Correctly format page_name
  [ticket/security-164] Sanitize all global variables in symfony_request class
  [ticket/13248] Use functional framework login method in tests
  [ticket/13248] Correctly pass provider name
  [ticket/13248] Always use provider collection for getting provider
  [ticket/13248] Allow specifying different auth provider in provider collection
  [ticket/13248] Use auth provider collection for getting provider
  [ticket/13262] Mention htaccess file when updating from 3.0 to 3.1
  [ticket/13267] Update Automatic Update instructions to include vendor directory
  [ticket/13268] Properly append ternary result in get_existing_indexes()
  [prep-release-3.1.1] Update version number to 3.1.1

Conflicts:
	build/build.xml
	phpBB/includes/constants.php
	phpBB/install/schemas/schema_data.sql
	phpBB/styles/prosilver/style.cfg
	phpBB/styles/subsilver2/style.cfg
	phpBB/styles/subsilver2/template/memberlist_email.html