lib-http: Add http_client_init_private()

This allows creating a HTTP client without a shared context, in case it's
needed for some reason.

src/lib-http/http-client.c

@@ -212,6 +212,12 @@ http_client_init(const struct http_client_settings *set)
 	return http_client_init_shared(http_client_get_global_context(), set);
 }
 
+struct http_client *
+http_client_init_private(const struct http_client_settings *set)
+{
+	return http_client_init_shared(NULL, set);
+}
+
 void http_client_deinit(struct http_client **_client)
 {
 	struct http_client *client = *_client;

src/lib-http/http-client.h

@@ -425,6 +425,9 @@ void http_client_request_start_tunnel(struct http_client_request *req,
 /* Create a client using the global shared client context. */
 struct http_client *
 http_client_init(const struct http_client_settings *set);
+/* Create a client without a shared context. */
+struct http_client *
+http_client_init_private(const struct http_client_settings *set);
 struct http_client *
 http_client_init_shared(struct http_client_context *cctx,
 	const struct http_client_settings *set) ATTR_NULL(1);