Revert "Disable SSL session ID caching."

This reverts commit debe0e345b.

content/fetchers/curl.c

@@ -646,9 +646,6 @@ static CURLcode fetch_curl_set_options(struct curl_fetch_info *f)
 		SETOPT(CURLOPT_PROXY, NULL);
 	}
 
-	/* Disable SSL session ID caching, as some servers can't cope. */
-	SETOPT(CURLOPT_SSL_SESSIONID_CACHE, 0);
-
 	if (urldb_get_cert_permissions(f->url)) {
 		/* Disable certificate verification */
 		SETOPT(CURLOPT_SSL_VERIFYPEER, 0L);