Reviewed Apache configuration

(in documentation)

For security purpose, block access to any static file not matching the list of allowed extensions.
It allows us to remove the specific retriction on dotfiles, and fix Apache part of #1608.

.htaccess

@@ -13,7 +13,7 @@ RewriteRule .* - [e=HTTP_AUTHORIZATION:%1]
 # Alternative (if the 2 lines above don't work)
 # SetEnvIf Authorization .+ HTTP_AUTHORIZATION=$0
 
-# REST API
+# Slim URL Redirection
 # Ionos Hosting needs RewriteBase /
 # RewriteBase /
 RewriteCond %{REQUEST_FILENAME} !-f

doc/md/Server-configuration.md

@@ -193,19 +193,24 @@ sudo nano /etc/apache2/sites-available/shaarli.mydomain.org.conf
         Require all granted
     </Directory>
 
-    <LocationMatch "/\.">
-        # Prevent accessing dotfiles
-        RedirectMatch 404 ".*"
-    </LocationMatch>
+    # BE CAREFUL: directives order matter!
 
-    <LocationMatch "\.(?:ico|css|js|gif|jpe?g|png)$">
+    <FilesMatch ".*\.(?!(ico|css|js|gif|jpe?g|png|ttf|oet|woff2?)$)[^\.]*$">
+        Require all denied
+    </FilesMatch>
+
+    <Files "index.php">
+        Require all granted
+    </Files>
+
+    <FilesMatch "\.(?:ico|css|js|gif|jpe?g|png|ttf|oet|woff2)$">
         # allow client-side caching of static files
         Header set Cache-Control "max-age=2628000, public, must-revalidate, proxy-revalidate"
-    </LocationMatch>
+    </FilesMatch>
+
 
     # serve the Shaarli favicon from its custom location
     Alias favicon.ico /var/www/shaarli.mydomain.org/images/favicon.ico
-
 </VirtualHost>
 ```