Use config cascade for style.ini files

This simplifies style loading and allows the plugins like farmer to
extend the the loading of style files. Also adds some first unit tests.

Originally discuss

Use config cascade for style.ini files

This simplifies style loading and allows the plugins like farmer to
extend the the loading of style files. Also adds some first unit tests.

Originally discussed in FS#2703 and #134

Squashed commit of the following:

commit 5ed550f6ba61a1d475b7572cbff18f0d790c78c2
Merge: 0cefed65e cab1833b0
Author: Andreas Gohr <gohr@cosmocode.de>
Date: Thu Feb 28 13:38:46 2019 +0100

Merge branch 'styleConfCascade' of https://github.com/annda/dokuwiki into annda-styleConfCascade

* 'styleConfCascade' of https://github.com/annda/dokuwiki:
Clean up StyleUtils
Update StyleUtils test
Fix array to boolean conversion
Use better placeholder string in config cascade
Calls to StyleUtils use the new constructor
Add test for StyleUtils
Refactor StyleUtils
WIP add temporary test comparing two implementations of StyleUtils
WIP add new style config cascade side by side with the old one

commit cab1833b09a59331a5580fe0e3e6f36d743dea09
Author: Anna Dabrowska <dabrowska@cosmocode.de>
Date: Thu Feb 21 17:54:27 2019 +0100

Clean up StyleUtils

commit 766e3907cf7b234c3f2fa7bf86f205c1c8c7c6e1
Author: Anna Dabrowska <dabrowska@cosmocode.de>
Date: Thu Feb 21 17:51:15 2019 +0100

Update StyleUtils test

commit f5c08787ddf9db60e3429421e5c627d5c81d876a
Author: Anna Dabrowska <dabrowska@cosmocode.de>
Date: Thu Feb 21 12:51:53 2019 +0100

Fix array to boolean conversion

commit c9671698992328d5671a43b2707ffc6c5b117423
Author: Anna Dabrowska <dabrowska@cosmocode.de>
Date: Thu Feb 21 12:38:55 2019 +0100

Use better placeholder string in config cascade

commit 4845eff54d227325476bb00b7c8402ce58cf72df
Author: Anna Dabrowska <dabrowska@cosmocode.de>
Date: Thu Feb 21 12:24:16 2019 +0100

Calls to StyleUtils use the new constructor

commit 7a6337a8f8f2cc0cedbf54ae0b43e94033192cb8
Author: Anna Dabrowska <dabrowska@cosmocode.de>
Date: Thu Feb 21 12:22:44 2019 +0100

Add test for StyleUtils

commit 5ae9e8f69e076ab2a18b24aa178cca15fea6b000
Author: Anna Dabrowska <dabrowska@cosmocode.de>
Date: Thu Feb 21 12:16:57 2019 +0100

Refactor StyleUtils

commit a2adcc9f37be93f4bcf90fdba4089ea4b0d6436e
Author: Anna Dabrowska <dabrowska@cosmocode.de>
Date: Sat Feb 16 23:58:04 2019 +0100

WIP add temporary test comparing two implementations of StyleUtils

commit 845c40c4faf379a65134e171514a09d47ffe95f1
Author: Anna Dabrowska <dabrowska@cosmocode.de>
Date: Sat Feb 16 23:59:41 2019 +0100

WIP add new style config cascade side by side with the old one

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translation update

Remove PHP user deprecation errors

Remove these errors pending proper discussion.
These errors could be a problem for installations that have HTML errors on
in production. Since DokuWikis is often

Remove PHP user deprecation errors

Remove these errors pending proper discussion.
These errors could be a problem for installations that have HTML errors on
in production. Since DokuWikis is often used in smaller and private
contexts, this is a scenario that should be considered.

show more ...

Refactor deprecation logging into its own class

This gives us the flexibility to handle both deprecated properties and
methods/functions properly.

Fix issue #2396

PSR2 style fixes

These are some simple whitespace/arrangement things that apparantly
can't be fixed automatically

PSR2 cleanup for the feedparser override

It might be a good idea to namespace the FeedParser class itself in the
future

PSR2 adjustments for SafeFN

the renamed methods were not used in any known plugin

translation update

Use deprecation helper

Instead of writing our own magic getters and setters for all variables
that used to be public, this adds a trait that does that in a generic
way.
This trait was copied from Me

Use deprecation helper

Instead of writing our own magic getters and setters for all variables
that used to be public, this adds a trait that does that in a generic
way.
This trait was copied from MediaWiki and adjusted to DokuWiki.
The original author seems to be @tgr Tisza Gergő

The downside of this trait is that the properties keep their
(potentially undesired) name. While that could be fixed within the
helper, that might add unnecessary complexity. The name can change when
support is dropped.

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use utf8_strtolower instead of strtolower

compare cleaned pageid case-insensitive in search, fixes #2613

rename Ajax Callbacks for PSR2

adjusted the Input clases for PSR2

They are now in their own namespace.

translation update

Use DokuWiki's own deprecation reporters

DokuWiki has its own way to report deprecation notifications.
Let's use it!

Rename fields and add deprecated __get/__set

These fields might still be accessed from the outside, so in order to
not break backwards compatibility, this uses magic methods that emit
deprecation er

Rename fields and add deprecated __get/__set

These fields might still be accessed from the outside, so in order to
not break backwards compatibility, this uses magic methods that emit
deprecation errors.

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translation update

Adjust comment to better reflect method

That method cannot be private or protected, since it has to be used by
the event handler. Thus adjust the method comment to internal to better
represent that

Adjust comment to better reflect method

That method cannot be private or protected, since it has to be used by
the event handler. Thus adjust the method comment to internal to better
represent that it shouldn't be used by other classes.

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Fix typo and rename method in comments too

Rename methods to conform with PSR 2

The method _useCache doesn't seem to be in use outside the core cache
classes[0], thus no deprecation placeholder was created.

[0]: https://codesearch.dokuwiki.

Rename methods to conform with PSR 2

The method _useCache doesn't seem to be in use outside the core cache
classes[0], thus no deprecation placeholder was created.

[0]: https://codesearch.dokuwiki.org/search?project=dokuwiki&project=plugin&project=template&q=&defs=&refs=_useCache&path=&hist=&type=php

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Refactor cache.php into different files

translation update

Fix regression in third-party JSON utility

translation update