Fix PHP 8 compatibility issues

- Add null safety check for $_SERVER['HTTP_ACCEPT_LANGUAGE'] in getBrowserLang() to prevent PHP 8.1+ deprecation warnings
- Add global $JSINFO declaration in helper co

Fix PHP 8 compatibility issues

- Add null safety check for $_SERVER['HTTP_ACCEPT_LANGUAGE'] in getBrowserLang() to prevent PHP 8.1+ deprecation warnings
- Add global $JSINFO declaration in helper constructor
- Remove extra parameter from buildTransID() call (function only accepts 2 params)
- Add null coalescing operators for $_SERVER['PHP_SELF'] and $_SERVER['REQUEST_URI'] in action.php
- Remove reference assignment operator from plugin_load() call in syntax/notrans.php (PHP 8 compatibility)

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Do not use require any more

Variable without referencing

Syntax Update

Update "var" to public/private vars. see [DokuWiki](https://github.com/splitbrain/dokuwiki/issues/1971)

Rename Plugin.

Merge remote-tracking branch 'splitbrain/master' into HEAD

# Conflicts:
# action.php
# conf/default.php
# conf/metadata.php
# helper.php
# lang/en/settings.php

renamed constructors for PHP7 compatibility

Adjust method signatures to match parent

Merge splitbrain/master into master

readd support for old PHP4 style constructor. closes #74

Merge original master into PR

use PHP5 style constructor of the cache object

Renamed a few members in helper.php

Give full name to make the code easier to read
by a newcomer

Updated action.php

* Fixed a few typos
* Renamed member "hlp" to "helper": it's longer to type
but easier to read for a newcomer

Fix indentations from tab to space.

Fix PHP Strict messages.

Autodetect namespace and redirect localized

When sub-namespaces are translated and use (they have to) the language
as namespace, this can be detected and supersedes the default namespace
configurati

Autodetect namespace and redirect localized

When sub-namespaces are translated and use (they have to) the language
as namespace, this can be detected and supersedes the default namespace
configuration.
Redirect Localized makes shure that you are bound to your language as
long as you travel to pages that support this language.

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fixed problem on ajax translation. closes #47

some code reformatting

fixed constant as string problem

Added option to copy original into the editor on new translation

added namespace template variables @TRANS@ and @LANG@

always set the current language in the session

use JS_CACHE_USE for JavaScript translation