FIX WebDav MacOS failed uploads php-fpm and big files (-36 error)

Current "SetEnvIf Transfer-Encoding "chunked" proxy-sendcl=1" setting fails with Macos Webdav Darwin client beacuse the header has a capital letter -> "Chunked" So you can fix it making condition case insensitive.
Extended description and tests results on https://github.com/nextcloud/server/issues/48878

Signed-off-by: Gonzalo Cao Cabeza de Vaca <57393+gonzalo@users.noreply.github.com>

.htaccess

@@ -103,7 +103,7 @@
 #  - https://docs.cyberduck.io/mountainduck/issues/fastcgi/
 #  - https://docs.nextcloud.com/server/latest/admin_manual/issues/general_troubleshooting.html#troubleshooting-webdav
 <IfModule mod_setenvif.c>
-  SetEnvIf Transfer-Encoding "chunked" proxy-sendcl=1
+  SetEnvIfNoCase Transfer-Encoding "chunked" proxy-sendcl=1
 </IfModule>
 
 # Apache disabled the sending of the server-side content-length header