set current revision date 1sec before now for external deletion

in preparation for possible new page save

translation update

update saveWikiText()

allow plugin that provides alternative policy for handling external edits in changelog

much better greek (el) translations

rigorous COMMON_WIKIPAGE_SAVE

ignore wrong changes in id and file data caused by event handlers

use time() for revision date of externally deleted page

also, code doc updates

rename saveRevisionInfo to cacheRevisionInfo

move hasRevision() to trait

removed wrong test

See
https://github.com/splitbrain/dokuwiki/pull/3272#issuecomment-966367900
for reasoning

fix fallback implementation for resolve_pageid()

When an empty link was given, the old implementation fell back to $ID,
this was handled incorrectly in the deprecated method.

simplify relative resolver and add tests

make resolveStartPage easier to understand

This dosn't really change the behaviour but makes the code easier to
grasp. A simple unit test has been added.

disable jit compiling to avoid broken pcre lib #3507

Update Ajax.php

linkwiz update

Update common_saveWikiText.test.php

getRevisions() may return empty array when changelog file does not yet exist.

rewrite unit test of saveWikiText

ChangeLogTrait

- move ChangeLog low level methods into trait
- static ChangeLog::parseLogLine() replaces parseChangeLogLine()
- new ChangeLog::buildLogLine()

translation update

new method ChangeLog::addLogEntry()

rewrite `detectExternalEdit()` in inc/common.php

change wrongly older mtime of current page than last revision

use false for unknown timestamp instead of 'unknown'

typo

get revision pair in Diff:handle()

set revInfo['current'] in Ui\Recents