Add support for HTTP/1.0.

HTTP/1.0 connections are closed by default after a single response. Other than that, treat 1.0 the same as 1.1.

HTTP/1.0 allows different date formats that we can't parse but for now, at least, we don't need any date headers from 1.0 requests.

src/common/io/http/request.c

@@ -14,6 +14,7 @@ HTTP Request
 HTTP constants
 ***********************************************************************************************************************************/
 STRING_EXTERN(HTTP_VERSION_STR,                                     HTTP_VERSION);
+STRING_EXTERN(HTTP_VERSION_10_STR,                                  HTTP_VERSION_10);
 
 STRING_EXTERN(HTTP_VERB_DELETE_STR,                                 HTTP_VERB_DELETE);
 STRING_EXTERN(HTTP_VERB_GET_STR,                                    HTTP_VERB_GET);