[ticket/11862] Correct var names in user_delete() events due to prune-users

The prune-users feature modified the names of the used variables in this
function. However, the variable names for the two events in this function
were not changed to reflect that. This patch will take care of it.

PHPBB3-11862
[ticket/11852] Split filesystem and path_helper into 2 classes

PHPBB3-11852
[ticket/11852] Move tests to folder with new class name

PHPBB3-11852
[ticket/11852] Add class file

PHPBB3-11852
Merge remote-tracking branch 'Marc/ticket/11862' into develop

* Marc/ticket/11862:
  [ticket/11862] Correct var names in user_delete() events due to prune-users
[ticket/11862] Correct var names in user_delete() events due to prune-users

Fix comments after incorrect merge of previous PR.

PHPBB3-11862
Merge remote-tracking branch 'Marc/ticket/11862' into develop

* Marc/ticket/11862:
  [ticket/11862] Correct var names in user_delete() events due to prune-users
[ticket/11873] Do not hash very large passwords in order to safe resources.

PHPBB3-11873
[ticket/11873] Add unit test for large password input.

The password should be rejected quite fast.

PHPBB3-11873
Merge branch 'ticket/11873' into prep-release-3.0.12

* ticket/11873:
  [ticket/11873] Add unit test for large password input.
  [ticket/11873] Do not hash very large passwords in order to safe resources.
[prep-release-3.0.12] Update changelog for 3.0.12 release.
Merge branch 'prep-release-3.0.12' into develop-olympus

* prep-release-3.0.12:
  [prep-release-3.0.12] Update changelog for 3.0.12 release.
  [ticket/11873] Add unit test for large password input.
  [ticket/11873] Do not hash very large passwords in order to safe resources.
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [prep-release-3.0.12] Update changelog for 3.0.12 release.
  [ticket/11873] Add unit test for large password input.
  [ticket/11873] Do not hash very large passwords in order to safe resources.
[develop-olympus] Build against 3.0.12 instead of 3.0.12-RC3. Tag exists now.
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [develop-olympus] Build against 3.0.12 instead of 3.0.12-RC3. Tag exists now.

Conflicts:
	build/build.xml
[ticket/11876] Move checksum generation from build PHP files to phing build.xml

This also removes paths from the checksum files.

PHPBB3-11876
[ticket/11876] Replace MD5 with SHA256.

PHPBB3-11876
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/11876] Replace MD5 with SHA256.
  [ticket/11876] Move checksum generation from build PHP files to phing build.xml
Merge pull request #1735 from nickvergessen/ticket/11852

Ticket/11852 filesystem class must not depend on a web request