http: drop support for curl < 7.19.3 and < 7.17.0 (again)

Remove the conditional use of CURLAUTH_DIGEST_IE and
CURLOPT_USE_SSL. These two have been split from earlier simpler checks
against LIBCURL_VERSION_NUM for ease of review.

According to

  https://github.com/curl/curl/blob/master/docs/libcurl/symbols-in-versions

the CURLAUTH_DIGEST_IE flag became available in 7.19.3, and
CURLOPT_USE_SSL in 7.17.0.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 0 insertions, 9 deletions

diff --git a/http.h b/http.h
index 19f19db..3db5a0c 100644
--- a/http.h
+++ b/http.h
@@ -12,15 +12,6 @@
 
 #define DEFAULT_MAX_REQUESTS 5
 
-/*
- * CURLOPT_USE_SSL was known as CURLOPT_FTP_SSL up to 7.16.4,
- * and the constants were known as CURLFTPSSL_*
-*/
-#if !defined(CURLOPT_USE_SSL) && defined(CURLOPT_FTP_SSL)
-#define CURLOPT_USE_SSL CURLOPT_FTP_SSL
-#define CURLUSESSL_TRY CURLFTPSSL_TRY
-#endif
-
 struct slot_results {
 	CURLcode curl_result;
 	long http_code;