htaccess.ms has a slightly under-optimized rule

[Denis-de-Bernardy]

it goes:

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule . - [L]

inconveniently, this does not catch the root folder, because the latter won't match the dot.

this will, however:

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]

[wpmuguru]

Putting your name on it because you are doing the wpfs.

[nacin]

Closing as duplicate of #12136 and incorporating this there.