Please retest (the test plan was improved).

Cosmetic comment fixes.

Fix for an exception on the configuration section for the "root" user.

When root opens a configuration section an exception is thrown:

Exception: Permission section not specified for prefix conf in ...\core\kernel\utility\event.php on line 439

Updated test plan.

The test plan doesn't include the removal of the Add permission for the Labels & Phrases section.

Fixed fatal error on system setting saving for the root user.

In D486#9799, @erik wrote:

Test by plan is passed, but, to have Groups section visible, with root user go to Configuration->Users-General section, press Save button - and got "Exception: Permission section not specified for prefix conf in w:\SVN\5.2.x\core\kernel\utility\event.php on line 439"

Removed excessive session update statement, that happens after it's creation.

The test plan doesn't cover all add/existing code as requested in the task. For example (but there could be more scenarios), these cases aren't covered:

I've updated test plan (up to date SSL certificate & different SSL test domains).

In D467#9487, @erik wrote:

All right in general, but

2.6 confirm, that the design of the login page was changed - changed, but only after memcache reset
5.4 - incomplete or excessive line in test plan
5.5 confirm, that an alt attribute of the invisible link in the top left corner (on red background) has one"two three value - there is such title attribute, no alt attribute

Indicate PHP_CodeSniffer & PHP_MessDetector versions, that support caching.

Removed debug code.

Bugfix: the PHP_MessDetector was building it's cache with absolute paths instead of a relative ones.