It is required by other functionalities such as S2S anyways and ownCloud will fail hard at a lot of places without it.

Ref https://github.com/owncloud/core/issues/10837#issuecomment-76516839

Maybe it helps in the future so we won't forget it again 🙈

This reverts commit 6a1a4880.

Function is not used anymore anywhere in the code base: https://github.com/search?q=user%3Aowncloud+secureRNGAvailable&type=Code&utf8=%E2%9C%93

Nobody reads the warnings anyways and so we should enforce it at installation time... Also allows us to get rid of some duplicated code.

To test change the `default_charset` to something other than `utf-8` or `UTF-8`, both should work fine with that change here. An error should then get shown.

We already set those default charsets in the shipped .user.ini and .htaccess

Apparently a boolean in php.ini is according to the documentation "on" or "off"…

Fixes itself.

This allows to check for specific values in the PHP.ini that ownCloud requires for full compatibility.

`mbstring.func_overload`: https://github.com/owncloud/core/issues/14372
`output_buffering`: http://doc.owncloud.org/server/8.0/admin_manual/configuration/big_file_upload_configuration.html#configuring-php

Fixes https://github.com/owncloud/core/issues/14372 and https://github.com/owncloud/core/issues/14412

This changeset removes the static class `OC_Request` and moves the functions either into `IRequest` which is accessible via `\OC::$server::->getRequest()` or into a separated `TrustedDomainHelper` class for some helper methods which should not be publicly exposed.

This changes only internal methods and nothing on the public API. Some public functions in `util.php` have been deprecated though in favour of the new non-static functions.

Unfortunately some part of this code uses things like `__DIR__` and thus is not completely unit-testable. Where tests where possible they ahve been added though.

Fixes https://github.com/owncloud/core/issues/13976 which was requested in https://github.com/owncloud/core/pull/13973#issuecomment-73492969

Add strtoupper() in UTF-8 check to avoid error message

The URL was previously encoded twice which leads to getting redirected to a 404 page when the password has been entered incorrect at least once.

Testplan:

- [ ] Opening `http://localhost/core/index.php?redirect_url=%2Fcore%2Findex.php%2Fsettings%2Fadmin` redirects to the admin page when providing the correct credentials
- [ ] Opening `http://localhost/core/index.php?redirect_url=%2Fcore%2Findex.php%2Fsettings%2Fadmin` redirects to the admin page when providing the invalid credentials and then providing valid ones.
- [ ] Logging in as admin then going to the admin page and clearing the cookies and refreshing will show the login and when repeating the above test steps you're redirected correctly.

Fixes https://github.com/owncloud/core/issues/9804

HHVM seems to have problems with this at the moment (even setting those values in the php.ini of HHVM doesn't have helped much) and thus the unit test execution failed.

So it's better if we disable this check for now for HHVM.

PHP 5.6 otherwise throws notices for perfectly valid code which results in broken endpoints.

Fixes https://github.com/owncloud/core/issues/13592

adapt decrypt all and restore/delete key backups to the new folder structure for encryption key introduced with OC8

Apparently `normalizer_normalize` is not verifying itself whether the string needs to be converted or not. Or does it at least not very performantly.

This simple change leads to a 4% performance gain on the processing of normalizeUnicode. Since this method is called quite often (i.e. for every file path) this has actually a measurable impact. For examples searches are now 200ms faster on my machine. Still not perfect but way to go.

Part of https://github.com/owncloud/core/issues/13221

check for working htaccess will result in a dead lock because the server is blocking the request to itself - fixes #13153

See https://github.com/owncloud/core/pull/13042

Make DateTimeFormatter a service and adjust tests that have been inaccurate

Both are removed from 5.4.0

Safe Mode: http://php.net/manual/en/features.safe-mode.php
> This feature has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 5.4.0.

Magic Quotes: http://php.net/manual/en/security.magicquotes.php
> This feature has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 5.4.0.

🍻