Squashed commit of the following:
-install iptables as it is not part of minimal install.
-change swig for bullseye to swig4.0
-php7.4-dev for build required (php-config)
-add python3-distutils
-libks seems to be required for mod_verto
-disable mod_avmd to keep in sync with ubuntu-config (eaaef03163 (diff-62a8f25a3200194e88b1073f2b11ebdf1622761f025a30158c012e83e5f593aa))
* added special option --use-php5-package
* parse options and export new environment variable USE_PHP5_PACKAGE
* added choice between php5* or php7.0* packages (recommited)
* fixed php*-fpm service name and php.ini file path (recommited)
* prepare socket name for nginx to work with php5-fpm or php7.0-fpm (recommited)
* added ppa:ondrej/php5-compat repo
* added dependency ppa:ondrej/php repo and package software-properties-common
* transition from php5* packages to php-7.0*
* added 3rd party repositories with php7.0-* packages for trusty and jessie
* added php7.0-xml package for Class SimpleXMLElement
* added apt-get update after adding php7.0* repository source