align url

ref https://github.com/dokuwiki/dokuwiki/issues/4270

- align url to standard prefix
- realign spacing

code style: line breaks

recover comments in list

Apply rector renames

Apply rector fixes to the rest of lib/plugin

info plugin: reuse render methods

This kidn of cleanup should be added for the other methods as well,
making it possible to export a info data to ODT for example.

info plugin: add hooks method

This lists all currently registered action hook handlers. Useful for
when debugging DokuWiki behaviour likely to be influenced by a plugin
and it's not clear which plug

info plugin: add hooks method

This lists all currently registered action hook handlers. Useful for
when debugging DokuWiki behaviour likely to be influenced by a plugin
and it's not clear which plugin might interfere.

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info plugin minor code cleanup

add datetime option to info plugin

It simply displays the time of the last render() call. This is useful
for cache debugging

Fix PHP 7.3 deprecations in lib/ directory.