Revert "Fix curl headers for solr > 5"
Revert "Fix curl headers for solr > 5"

simgroep/solarium,basdenooijer/solarium,keesschepers/solarium,keesschepers/solarium,chadicus/solarium,shieldo/solarium,basdenooijer/solarium,bpolaszek/solarium,cmattoon/solarium,cmattoon/solarium