Version: 1.19.4

If both `-r' (recursive) and `-N' (check timestamp) options are given and the server returns 304 (Not Modified), the HTML file (already downloaded) is not considered as a HTML file and links in the HTML file are not followed.

If we want to (periodically) backup some website (all pages are linked from index.html directly or indirectly) to track some changes while avoiding unnecessary downloads, we naturally use `-N' option. However, if some "leaf" pages are changed but index.html is unchanged, we could miss some important changes.

I hate this behavior (`-nc' option mostly works because it guesses HTML file by its file name suffix but `-N' doesn't) so I decided to propose a small change.

The attached patch reuses `get_file_flags` (which guesses HTML file by file name suffix when -nc (no clobber) option is given) if the server returns 304 (Not Modified).

Note that:

1. This patch slightly changes Wget's behavior.
2. It makes a caveat similar to bug #50935. If solution to bug #50935 is invented, it can be (and should be) applied to this.
3. I (as author) consider this patch is too small to be copyrighted.

I tested the patch but I'm not sure whether this patch is suitable for upstream merge. I consider this as improvement but you may consider I broke the behavior.

Please let me know if you have any feedback about this.