We include these autogenerated files directly where they are needed.

Let the main sphinx process ignore them, so it doesn't complain that they're
not referenced anywhere.

Try to document our conventions when it comes to commands, paths, tool names
and similar.

Also write some formatting rules for maintainers, like wrapping at 80
characters and avoiding tabs.

I'm happy to discuss changing these if someone feels strongly about anything,
the main point is just to make it easier to read though being consequent about
it throughout the manual.

req.request is now called req.method.

We don't know how to handle incoming chunked bodies currently, but the backend
might.

Done. Important changes are consequently commented and all comments are marked with the string 'benc' for easy identification. There are some heavy refactorings done, that fundamentally changes content meaing.

We now set Connection: Close on all piped backend requests, to avoid some of
the debugging pain seen over the last 2-3 years.

Basic problem is that request backend routing done in vcl_recv would not be
honored for subsequent requests after one was piped.

This was, at least for new users, a rather nasty surprise.

Original change in commit 880c3c2a.

This reverts commit 0f90ee22.

After looking at this again, I see that the busyobj is cleared as it
should as part of VBO_DerefBusyObj(). Reverting the patch.

- use -fstack-protector only if both compiler and linker support it
- use -Wno-missing-field-initializers vs -Wno-extra depending on compiler support
- -Wno-pointer-sign only if compiler supports it
- add -Wno-address to avoid "the address of ‘buf’ will never be NULL" warning in
  cache_backend_cfg.c (and in other places where REPLACE() is used with local
  buf variable)

Fixes: #1458