title: php-fpm: settings in mods-available/xdebug.ini have no effect
body: <p>I'm trying to apply custom xdebug settings via editing mods-available/xdebug.ini but when I restart php-fpm there are only the default settings applied. There are no related errors in the error logs visible.</p>
  <p>What could be the reason that the custom settings are not applied?</p>
  <pre class="lang- prettyprint-override"><code>zend_extension=xdebug.so
  xdebug.remote_enable=on
  xdebug.default_enable=on
  xdebug.remote_autostart=off
  #The default port 9000 doesn’t work as some other service (don’t remember which one) is using it as well
  xdebug.remote_port=10000
  
  #phpstorm's xdebug validate tool suggests:
  #xdebug.remote_host=172.27.0.1
  #but it's not working
  #on mac you have to use this for docker
  #xdebug.remote_host=docker.for.mac.localhost
  #or (is the more recent one):
  xdebug.remote_host = host.docker.internal
  #more info:
  #https://intellij-support.jetbrains.com/hc/en-us/community/posts/360000229624-Setting-up-xDebug-with-PHPUnit-using-Docker-for-Mac-and-PHPStorm
  #https://devilbox-test.readthedocs.io/en/stable/tutorials/enable-xdebug.html
  #https://docs.docker.com/docker-for-mac/networking/#use-cases-and-workarounds
  
  
  xdebug.profiler_enable_trigger=1
  xdebug.profiler_output_name=xdebug-profile-cachegrind.out-%H-%R
  xdebug.var_display_max_children = 128
  xdebug.var_display_max_data = 512
  xdebug.var_display_max_depth = 3
  xdebug.idekey=PHPSTORM
  </code></pre>