Smalls addons for nginx config

[dcaillibaud]

Adding some fastcgi parameter to nginx config (and a link to wwsympa.service sample) for spawn-fcgi

[ikedas]

As of 6.2.56, wwsympa became splitting URI by itself: See sympa-community/sympa#879 for details. That's why description about split_path_info was removed from example: It was moved to the note below.

As you wrote, CSS path may be required. I'll check it.

Thanks for inputs!

[dcaillibaud]

Sorry, I didn't see theses notes (I'm still in 6.2.40 with debian buster and these lines are required, as note says).
I don't know if you can exclude the second commit from this PR, to keep the link added in the first commit.

If not I let you close the PR without merge, sorry for the noise.

[racke]

The CSS part is only needed for Debian installations.

[ikedas]

Hi @dcaillibaud ,

As you wrote, CSS path may be required. I'll check it.

$CSSDIR and $PICTURESDIR were subdirectories of $STATICDIR by default, on version prior to 6.2.26. However recently they are vary by environments (check the links of three). For purpose of example, I think all of these three would be better to appear in description.

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BTW, to include your changes, could you please include addition of your name to /AUTHORS.md file into this PR? It is required by the license applied to this documentation (CC-BY-SA 4.0).

[ikedas]

This link points the file not using spawn-fcgi.

[ikedas]

Detailed description will be added by PR #89.

[ikedas]

Hi @dcaillibaud , thanks for proposal of improvements. I included most of them into my PR and merged it. If you noticed anything, please submit changes again.

Thank you for input!