Apply rector fixes to extension plugin

Apply rector fixes to config plugin

Apply rector fixes to auth plugins

Apply rector fixes to lib/plugin/acl

Apply rector fixes to lib/exe

fix Cannot use assign-op operators with string offsets

prevent rector from rewriting this into an auto-assignment.

fix codesniffer violations

Apply rector fixes to the rest of inc

Apply rector fixes to inc/Parsing

Apply rector fixes to inc/parser

Apply rector fixes to inc/HTTP

relax instance check in remoteAPI loading

This broke tests. Ideally an Interface should be defined that both the
real APICore and the TestPlugin implement.

fix sizehandling in Changelog

Seems rector was too aggressive here in removing a variable.

fix overlong line introduced by rector

remove non-existing file from autoloader

define some more constants

when using bootstrapping, these defines seem not to be auto detected
anymore. We probably have to add a few more once we start running on
plugins.

Apply rector fixes to inc/Utf8

Apply rector fixes to inc/Ui

Apply rector fixes to inc/Subscriptions

Apply rector fixes to inc/Remote

Apply rector fixes to inc/Menu

Apply rector fixes to inc/Input

Apply rector fixes to inc/Form

Apply rector fixes to inc/File

Apply rector fixes to inc/ChangeLog