Removed extra allocation for r->uri.

The ngx_http_parse_complex_uri() function cannot make URI longer and does
not null-terminate URI, so there is no need to allocate an extra byte.  This
allocation appears to be a leftover from changes in 461:a88a3e4e158f (0.1.5),
where null-termination of r->uri and many other strings was removed.

src/http/ngx_http_request.c

diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index 73ab204..d453b8a 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -1230,7 +1230,7 @@
             r->uri.len++;
         }
 
-        r->uri.data = ngx_pnalloc(r->pool, r->uri.len + 1);
+        r->uri.data = ngx_pnalloc(r->pool, r->uri.len);
         if (r->uri.data == NULL) {
             ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
             return NGX_ERROR;