SPRXCLT-21: Add head() method to return full HTTP headers#311

bert-e merged 2 commits intodevelopment/8.2scality/sproxydclient:development/8.2from

improvement/SPRXCLT-21/implement-head-with-full-headersscality/sproxydclient:improvement/SPRXCLT-21/implement-head-with-full-headersCopy head branch name to clipboard