Buffer chunked requests

Signed-off-by: Louis Chemineau <louis@chmn.me>

.htaccess

@@ -94,5 +94,16 @@
   RewriteRule ^(?:\.(?!well-known)|autotest|occ|issue|indie|db_|console).* - [R=404,L]
 </IfModule>
 
+# Chunked request arrive to Nextcloud with no "Content-Length" header.
+# This breaks upload from 3rdparty client like xDavv5 on Android, or Cyberduck.
+# This directive will force the problematic requests to be chunked before being forwarded to Nextcloud.
+# This way, the "Transfer-Encoding" header is remove, and the "Content-Length" header is set.
+# Here is more information about the issue: https://docs.cyberduck.io/mountainduck/issues/fastcgi/
+<IfModule setenvif.c>
+  <Location "/remote.php">
+    SetEnvIf Transfer-Encoding "chunked" proxy-sendcl=1
+  </Location>
+</IfModule>
+
 AddDefaultCharset utf-8
 Options -Indexes