[PATCHv3 2/3] imap-send.c: introduce the GIT_TRACE_CURL enviroment variable

[Elia Pinto <gitter.spiros@gmail.com>]

Permit the use of the GIT_TRACE_CURL environment variable calling
the curl_trace and curl_dump http.c helper routine.

Helped-by: Torsten Bögershausen <tboegi@web.de>
Helped-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Elia Pinto <gitter.spiros@gmail.com>
---
 imap-send.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/imap-send.c b/imap-send.c
index 938c691..61c6787 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -1444,6 +1444,12 @@ static CURL *setup_curl(struct imap_server_conf *srvc)
 	if (0 < verbosity || getenv("GIT_CURL_VERBOSE"))
 		curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
 
+	if (curl_trace_want()) {
+		curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
+		curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, curl_trace);
+		curl_easy_setopt(curl, CURLOPT_DEBUGDATA, NULL);
+	}
+
 	return curl;
 }
 
-- 
2.8.1.383.g31b84cc