[PATCH v4 1/4] http: add support selecting http version

["Force Charlie via GitGitGadget" <gitgitgadget@gmail.com>]

From: Force Charlie <charlieio@outlook.com>

Signed-off-by: Force Charlie <charlieio@outlook.com>
---
 http.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/http.c b/http.c
index 3dc8c560d6..99cb04faba 100644
--- a/http.c
+++ b/http.c
@@ -48,6 +48,7 @@ char curl_errorstr[CURL_ERROR_SIZE];
 
 static int curl_ssl_verify = -1;
 static int curl_ssl_try;
+static int curl_http_version = 11;
 static const char *ssl_cert;
 static const char *ssl_cipherlist;
 static const char *ssl_version;
@@ -284,6 +285,10 @@ static void process_curl_messages(void)
 
 static int http_options(const char *var, const char *value, void *cb)
 {
+	if (!strcmp("http.version",var)) {
+		curl_http_version=git_config_int(var,value);
+		return 0;
+	}
 	if (!strcmp("http.sslverify", var)) {
 		curl_ssl_verify = git_config_bool(var, value);
 		return 0;
@@ -806,6 +811,13 @@ static CURL *get_curl_handle(void)
 		curl_easy_setopt(result, CURLOPT_SSL_VERIFYHOST, 2);
 	}
 
+#if LIBCURL_VERSION_NUM >= 0x073100
+	if(curl_http_version == 20){
+		/* CURL Enable HTTP2*/
+		curl_easy_setopt(result, CURLOPT_HTTP_VERSION,CURL_HTTP_VERSION_2);
+     }
+#endif
+
 #if LIBCURL_VERSION_NUM >= 0x070907
 	curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 #endif
-- 
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