http: stop on server EOF

We stop the read loop when we have read all the data.  We should also
consider the server's feelings.

If the server hangs up on us, we need to stop our read loop.  Otherwise,
we'll try to read from the server - and fail - ad infinitum.

src/transports/http.c

@@ -934,8 +934,13 @@ replay:
 	while (!bytes_read && !t->parse_finished) {
 		t->parse_buffer.offset = 0;
 
-		if ((error = gitno_recv(&t->parse_buffer)) < 0)
+		if ((error = gitno_recv(&t->parse_buffer)) < 0) {
 			goto done;
+		} else if (error == 0) {
+			git_error_set(GIT_ERROR_NET, "unexpected disconnection from server");
+			error = -1;
+			goto done;
+		}
 
 		/*
 		 * This call to http_parser_execute will invoke the on_*
@@ -1178,8 +1183,13 @@ replay:
 
 		data_offset = t->parse_buffer.offset;
 
-		if ((error = gitno_recv(&t->parse_buffer)) < 0)
+		if ((error = gitno_recv(&t->parse_buffer)) < 0) {
 			goto done;
+		} else if (error == 0) {
+			git_error_set(GIT_ERROR_NET, "unexpected disconnection from server");
+			error = -1;
+			goto done;
+		}
 
 		/*
 		 * This call to http_parser_execute will result in invocations