as pointed out in
https://github.com/splitbrain/dokuwiki/pull/1530/files/b89dfc20f1e13333ce49ce0d6a3a83cc9836094b#r60392099

As suggested by @micgro42 the plugin namespace should use a vendor
prefix to avoid name clashes when DokuWiki is integrated with other
software.

This introduces an autoloader for namespaces starting with plugin\*

This way, plugins can easily have additional classes auto loaded without
needing to register their own loader. A plugin\*\test\* namespace will
automatically be mapped to the _test directory of the plugin.

TLS fix for HTTPClient

This should fix the test problems errors in #1527. When requesting a
HTTPS URI from a HTTP only proxy, the initial connection is *not* TLS
secured. The URI scheme is only relevant when directly connecting.

This also changes the (wrong) assumption that everything on port 443 is
always TLS secured. Only the URI scheme should decide that.

This is to ensure that we use SSL/TLS if a custom port is defined an no
proxy is used.

Fixes #1526

Form TagCloseElements should conform to expectations of functions inherited from Element

Reflection based method export for remote plugins

make reuse of mediamanager popup easier

add support for new Django hashing methods

obfuscate auth passwords in config. fixes #1487

Translation update (ro)

The header() method of PHP is vulnerable to HTTP Response Splitting
attacks.

This change makes sure the URL passed to send_redirect (and thus to
header()) does not contain any control characters that would be needed
to execute such an attack.

Cleaning input is recommended anyway.

Translation update (pt-br)

missed a line in my last commit

This makes it easier to create tabs with an active tab (no need for
additional markup)

Translation update (ko)

Fixes for the FR translation

A few fixes.

multicheckbox without extra string input

remoteuser - Patch for default setting and improved checking in hasAccess()

we already do it for other passwords, so it makes sense to do it here as
well.

#1477:Search heading still displayed although search disabled

use getNS() call instead of dirname()

New Python Django application default to PBKDF2 with SHA256 as a
password mechanism. This adds support for that mechanism in our
password hasher class. This will be needed in the tests for the new
PDO auth plugin.

Fixes #1480

* master:
  refactor page saving and introduce COMMON_WIKIPAGE_SAVE

This makes sure the provided callback is using alphanumerics only. I'm
not sure this is needed, but better safe than sorry.

refactor page saving and introduce COMMON_WIKIPAGE_SAVE