SPDY: fixed parsing of http version.

There is an error while parsing multi-digit minor version numbers (e.g.
"HTTP/1.10").

src/http/ngx_http_spdy.c

diff --git a/src/http/ngx_http_spdy.c b/src/http/ngx_http_spdy.c
index 20755f4..b5bfe18 100644
--- a/src/http/ngx_http_spdy.c
+++ b/src/http/ngx_http_spdy.c
@@ -2794,6 +2794,10 @@
 
         ch = *p;
 
+        if (ch == '.') {
+            break;
+        }
+
         if (ch < '0' || ch > '9') {
             return NGX_HTTP_PARSE_INVALID_REQUEST;
         }