Add a note about blocked Debian PHP packages
Add a note about blocked Debian PHP packages

docker-solr/docs,ceejatec/docs,avoinea/docs,crate/docker-docs,nats-io/docker-docs,dmetzler/docker-library-docs,docker-library/docs,avoinea/docs,31z4/docs,ceejatec/docs,infosiftr/docker-library-docs,Lightstreamer/docs,docker-flink/docs,tilosp-docker/library-docs,jetty-project/docker-docs,docker-library/docs,nats-io/docker-docs,crate/docker-docs,zendtech/docs,31z4/docs,jetty-project/docker-docs,tilosp-docker/library-docs,Bonitasoft-Community/docker_docs,Bonitasoft-Community/docker_docs,Lightstreamer/docs,docker-flink/docs,odoo/docker-docs,dinogun/docs,docker-solr/docs,infosiftr/docker-library-docs,zendtech/docs,dinogun/docs,dmetzler/docker-library-docs,odoo/docker-docs