upgrade to phpseclib 3

This replaces the dependabot PR #4114 and adjusts the usage of the
library.

LegacyAPI: fix return types on missing pages

fix error handling in XMLRPC

response errors in call() need to be returned as Error not as thrown
Exception.

API: fix media handling in legacy API

API: add backward compatibility to API Version 11

This adds legacy support for the old API calls. This is mostly untested
but should work. Returns might not be 100% compatible in all cases but I
did

API: add backward compatibility to API Version 11

This adds legacy support for the old API calls. This is mostly untested
but should work. Returns might not be 100% compatible in all cases but I
did my best to return the same things as before.

This will be removed in the future of course and is just to not
completely break any API usage immeadiately.

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fix japanese romanization. fixes #4047

Adjusted two entries after deduplication based on feedback by @ssahara

API: code style fixes

compatibility fix in ClassResolver

T_NAME_QUALIFIED is only available in PHP8+, earlier it's simply a
T_STRING

API added simple JSONRPC tests

fix XMLRPC server tests

We test against the MockAPICore now since the tests are meant to ensure
the general functionality of accepting XML and correctly calling
APICalls works, not that the API retu

fix XMLRPC server tests

We test against the MockAPICore now since the tests are meant to ensure
the general functionality of accepting XML and correctly calling
APICalls works, not that the API returns the right things (this is
tested in the ApiCore tests).
Since we no longer use dates but always integers, we no longer need to
handle that.

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API: ApiCore tests fixed and extended

Another argument parsing fix for ApiCall

When using named parameters, you can expect to be able to leave out any
optional parameter and have it take it's default, even when you specify
another "late

Another argument parsing fix for ApiCall

When using named parameters, you can expect to be able to leave out any
optional parameter and have it take it's default, even when you specify
another "later" parameter. Luckily we already know all the defaults from
reflection anyway.

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API: fix named parameter handling in APICall

We cannot set missing paramerers to null. We need to make sure they are
not set at all.

API: make responses sortable

All responses now need to implement __toString() so they can be easily
sorted or printed.

API: fix listPages

Not all needed fields are returned by the search callback

API: getPageHistory is nicer than getPageVersions

API: checkPage needs to consider revision

API: always pass revision as integer

API fix depth handling in listPages

API: initialize responses explicitly

Instead of passing unknown arrays, explicit parameters are passed.
Revision handling should now work correctly since we can pass revision=0
but a mtime.

API: remove file and date transformations

We always deal with timestamps or base64 now. Removing some of the magic
makes everything less complex.

Only affected plugin is confmanager, which needs an

API: remove file and date transformations

We always deal with timestamps or base64 now. Removing some of the magic
makes everything less complex.

Only affected plugin is confmanager, which needs an update.

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API: clean up error codes

Error codes are now extracted from API core and printed on the OpenAPI
overview page. This makes it easier to see what is in use.

Error messages have been cleaned up, some

API: clean up error codes

Error codes are now extracted from API core and printed on the OpenAPI
overview page. This makes it easier to see what is in use.

Error messages have been cleaned up, some new codes have been assigned.

Some errors have been removed. Eg. it is fine to iterate a media
namespace you don't have read access to. The result will either be empty
or contain files from lower namespaces that you *do* have access to.

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API: Do not assume the start page for empty pageIDs

ensure api explorer stays english

See https://github.com/Authress-Engineering/openapi-explorer/issues/207

moved OpenAPI generator to correct namespace

added missing doc blocks