netdata: patch nonsense when serving static files

pkgs/tools/system/netdata/default.nix

···
 
   buildInputs = [ autoreconfHook zlib pkgconfig ];
 
+  patches = [ ./web_access.patch ];
+
   meta = with stdenv.lib; {
     description = "Real-time performance monitoring tool";
     homepage = http://netdata.firehol.org;

pkgs/tools/system/netdata/web_access.patch

···
+--- a/src/web_client.c.orig     2016-04-15 19:00:49.912539101 +0200
++++ b/src/web_client.c  2016-04-15 19:01:19.379960970 +0200
+@@ -293,6 +293,7 @@
+        }
+ 
+        // check if the file is owned by us
++#if 0
+        if(stat.st_uid != web_files_uid()) {
+                error("%llu: File '%s' is owned by user %d (I run as user %d). Access Denied.", w->id, webfilename, stat.st_uid, getuid());
+                buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", filename);
+@@ -303,7 +304,7 @@
+                snprintf(webfilename, FILENAME_MAX+1, "%s/index.html", filename);
+                return mysendfile(w, webfilename);
+        }
+-
++#endif
+        if((stat.st_mode & S_IFMT) != S_IFREG) {
+                error("%llu: File '%s' is not a regular file. Access Denied.", w->id, webfilename);
+                buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", filename);
+