Fixed nginx split paths config issue (#3077)

* Fixed nginx split paths config issue

* Improved config comments.

* s/fixes/see/

* Added link to nginx issue tracker

CREDITS.md

@@ -45,6 +45,7 @@ People are sorted by name so please keep this order.
 * [Guillaume Hayot](https://github.com/postblue): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:postblue), [Web](https://postblue.info/)
 * [hckweb](https://github.com/hckweb): [contributions](https://github.com/FreshRSS/FreshRSS/commits?author=hckweb)
 * [hoilc](https://github.com/hoilc): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:hoilc)
+* [Jake Mannens](https://github.com/jakem72360): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:jakem72360)
 * [Jan van den Berg](https://github.com/jan-vandenberg): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:jan-vandenberg), [Web](https://j11g.com/)
 * [Jaussoin Timothée](https://github.com/edhelas): [contributions](https://github.com/FreshRSS/FreshRSS/commits?author=edhelas), [Web](http://edhelas.movim.eu/)
 * [jlefler](https://github.com/jlefler): [contributions](https://github.com/FreshRSS/FreshRSS/pulls?q=is:pr+author:jlefler)

docs/en/admins/10_ServerConfig.md

@@ -91,7 +91,10 @@ server {
 		fastcgi_split_path_info ^(.+\.php)(/.*)$;
 		# By default, the variable PATH_INFO is not set under PHP-FPM
 		# But FreshRSS API greader.php need it. If you have a “Bad Request” error, double check this var!
-		fastcgi_param PATH_INFO $fastcgi_path_info;
+		# NOTE: the separate $path_info variable is required. For more details, see:
+		# https://trac.nginx.org/nginx/ticket/321
+		set $path_info $fastcgi_path_info;
+		fastcgi_param PATH_INFO $path_info;
 		include fastcgi_params;
 		fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
 	}

docs/fr/users/01_Installation.md

@@ -119,7 +119,10 @@ server {
 		fastcgi_split_path_info ^(.+\.php)(/.*)$;
 		# Par défaut la variable PATH_INFO n’est pas définie sous PHP-FPM
 		# or l’API FreshRSS greader.php en a besoin. Si vous avez un “Bad Request”, vérifiez bien cette dernière !
-		fastcgi_param PATH_INFO $fastcgi_path_info;
+		# REMARQUE : l'utilisation de la variable $path_info est requis. Pour plus de détails, voir :
+		# https://trac.nginx.org/nginx/ticket/321
+		set $path_info $fastcgi_path_info;
+		fastcgi_param PATH_INFO $path_info;
 		include fastcgi_params;
 		fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
 	}