http: init and cleanup separately from http-walker

Previously, all our http operations were done with http-walker. With the
new remote-curl helper, we find ourselves using http methods outside of
http-walker - for example, fetching info/refs.

Accomodate this by separating http_init() and http_cleanup() invocations
from http-walker.

Signed-off-by: Tay Ray Chuan <rctay89@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/remote-curl.c b/remote-curl.c
index a904164..e8485d1 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -25,7 +25,7 @@
 static void init_walker(void)
 {
 	if (!walker)
-		walker = get_http_walker(url, remote);
+		walker = get_http_walker(url);
 }
 
 static int set_option(const char *name, const char *value)
@@ -810,6 +810,8 @@
 		url = remote->url[0];
 	}
 
+	http_init(remote);
+
 	do {
 		if (strbuf_getline(&buf, stdin, '\n') == EOF)
 			break;
@@ -855,5 +857,8 @@
 		}
 		strbuf_reset(&buf);
 	} while (1);
+
+	http_cleanup();
+
 	return 0;
 }