retry request without query when info/refs?query fails

retry request without query when info/refs?query fails

When "info/refs" is a static file and not behind a CGI handler, some
servers may not handle a GET request for it with a query string
appended (eg. "?foo=bar") properly.

If such a request fails, retry it sans the query string. In addition,
ensure that the "smart" http protocol is not used (a service has to be
specified with "?service=<service name>" to be conformant).

Signed-off-by: Tay Ray Chuan <redacted>
Reported-and-tested-by: Yaroslav Halchenko <redacted>
Acked-by: Shawn O. Pearce <redacted>
Signed-off-by: Junio C Hamano <redacted>