codestyle adjustments: class declaration braces

codestyle adjustments: function argument spacing

Apply rector renames

define custom renames

Automatically rename occurances of deprecated functions and classes.
These renames will come in even more handy when rector is applied to 3rd
party plugins.

workflow improvements

* make bot PRs more easy to spot
* better PR message for autofix
* no more checkstyle to annotation

comment fix in install.php

Apply rector fixes to bin and toplevel

Apply remaining rector fixes to lib

apply PSR-12 constant visibility rule

PSR-12 says constants need their visibility declared from PHP 7.1
onwards

codestyle fixes

Apply rector fixes to lib/tpl/dokuwiki

Apply rector fixes to the rest of lib/plugin

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.