Update for usage in mediawiki 1.39

[Oliver-Tautz]

I replaced depreciated hooks with new ones and the page edit is now done via the api and the php-curl module.

For API usage, I needed to add a variable to be set in Localsettings.php but set a sane default value.

Also the extension can now write to a logfile, also definable in the Localsettings.php

Still TODO:

• get mediawiki api url from code without user input
• test recursion stop
• add reasonable error handling

[mmarx]

Solved in #17 in a way that avoids going through the Action API, which should be much more robust and doesn't need any additional configuration.