partial undo of a4a4696: BUILDPACK_URL must not be blacklisted
partial undo of a4a4696: BUILDPACK_URL must not be blacklisted

jayelkaake/heroku-buildpack-magento,commoncurriculum/heroku-buildpack-php,CloudSide/heroku-buildpack-php,babarinde/heroku-buildpack-php,tungnguyenson/heroku-buildpack-nginx-php-phalcon,cloudfoundry/php-buildpack-legacy,alzheic/heroku-buildpack-aop,dzuelke/heroku-buildpack-php,emeth-/heroku-buildpack-php,0ppy/sample-buildpack,wzrdtales/heroku-buildpack-php,dou800/php-buildpack-legacy,rs-makino/buildpack-test,martijngastkemper/heroku-buildpack-php,djuuru/heroku-buildpack-php,a2service/heroku-buildpack-php,pauljfranklin/heroku-buildpack-apache,heroku/heroku-buildpack-php,jopereyral/heroku-buildpack-php,tungbi/heroku-buildpack-php,brendanmcdaniel/heroku-buildpack-php,stof/heroku-buildpack-php-1,wesrc/heroku-buildpack-php-1,Futurelearn/heroku-buildpack-php,ActivKonnect/heroku-buildpack-php,bartuspan/heroku-buildpack-php,rs-makino/buildpack-test,heroku/heroku-buildpack-php,rouheet/heroku-buildpack-php,fgbreel/heroku-buildpack-php,jjmontgo/phalcon-buildpack,phansys/heroku-buildpack-php,wesrc/heroku-buildpack-php-1,pauljfranklin/heroku-buildpack-apache,rs-makino/buildpack-test,wzrdtales/heroku-buildpack-php,createmultimedia/heroku-buildpack-php,fizz/heroku-buildpack-php,heroku/heroku-buildpack-php,createmultimedia/heroku-buildpack-php,heroku/heroku-buildpack-php,rouheet/heroku-buildpack-php,a2service/heroku-buildpack-php,rikur/heroku-buildpack-php,flant/heroku-buildpack-php,tungnguyenson/heroku-buildpack-nginx-php-phalcon,wordpressmonk/herokuphp,Apelsin/heroku-buildpack-phabricator,Xev/heroku-app-buildpack-php,dou800/php-buildpack-legacy,tucksaun/heroku-buildpack-php,puteulanus/heroku-buildpack-php,flant/heroku-buildpack-php,djuuru/heroku-buildpack-php,dou800/php-buildpack-legacy,bletchley/heroku-buildpack-php,bajke992/heroku-buildpack-php,ActivKonnect/heroku-buildpack-php,thecsea/heroku-buildpack-php-with-ioncube,dou800/php-buildpack-legacy,jstacoder/heroku-buildpack-php,jopereyral/heroku-buildpack-php,emeth-/heroku-buildpack-php,josecelano/heroku-buildpack-php,rikur/heroku-buildpack-php,philippwiendl/heroku-buildpack-php,dou800/php-buildpack-legacy,mrapogee/heroku-buildpack-php,wordpressmonk/herokuphp,jstacoder/heroku-buildpack-php,toshipon/heroku-buildpack-php,duythien/heroku-buildpack-php,dou800/php-buildpack-legacy,commoncurriculum/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,bajke992/heroku-buildpack-php,emeth-/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,iskandar/heroku-buildpack-php,alzheic/heroku-buildpack-aop,dou800/php-buildpack-legacy,Xev/heroku-app-buildpack-php,penciu/heroku-php-buildpack,cloudfoundry/php-buildpack-legacy,cloudfoundry/php-buildpack-legacy,babarinde/heroku-buildpack-php,InnoraG/heroku-buildpack-php,jopereyral/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,jayelkaake/heroku-buildpack-magento,createmultimedia/heroku-buildpack-php,phansys/heroku-buildpack-php,rikur/heroku-buildpack-php,aakilfernandes/heroku-buildpack-php,penciu/heroku-php-buildpack,dzuelke/heroku-buildpack-php,martijngastkemper/heroku-buildpack-php,flant/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,stof/heroku-buildpack-php-1,dzuelke/heroku-buildpack-php,InnoraG/heroku-buildpack-php,a2service/heroku-buildpack-php,bartuspan/heroku-buildpack-php,bletchley/heroku-buildpack-php,0ppy/sample-buildpack,fizz/heroku-buildpack-php,josecelano/heroku-buildpack-php,puteulanus/heroku-buildpack-php,jayelkaake/heroku-buildpack-magento,thecsea/heroku-buildpack-php-with-ioncube,Futurelearn/heroku-buildpack-php,0ppy/sample-buildpack,philippwiendl/heroku-buildpack-php,rs-makino/buildpack-test,tungbi/heroku-buildpack-nginx-php-phalcon,duythien/heroku-buildpack-php,fgbreel/heroku-buildpack-php,tungbi/heroku-buildpack-php,alzheic/heroku-buildpack-aop,dou800/php-buildpack-legacy,tideways/heroku-buildpack-php,elpereon/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,mrapogee/heroku-buildpack-php,brendanmcdaniel/heroku-buildpack-php,tungbi/heroku-buildpack-nginx-php-phalcon,AV4TAr/heroku-buildpack-php,dou800/php-buildpack-legacy,iskandar/heroku-buildpack-php,elpereon/heroku-buildpack-php,tucksaun/heroku-buildpack-php,AV4TAr/heroku-buildpack-php,marcofognog/cedar-14-php-buildpack,aakilfernandes/heroku-buildpack-php,jjmontgo/phalcon-buildpack,rs-makino/buildpack-test,rikur/heroku-buildpack-php,CloudSide/heroku-buildpack-php,marcofognog/cedar-14-php-buildpack,DNESS/heroku-buildpack-php,Apelsin/heroku-buildpack-phabricator,puteulanus/heroku-buildpack-php,tideways/heroku-buildpack-php,emeth-/heroku-buildpack-php,thecsea/heroku-buildpack-php-with-ioncube,rs-makino/buildpack-test,DNESS/heroku-buildpack-php,toshipon/heroku-buildpack-php