[3.0.2-pre] Thumbnail request fails with ampersand in filename

[de-es]

Seadroid doesn't seem to send the right request to Seahub to get the thumbnail when there is an ampersand char in the filename.

Example from nginx log:

"GET /api2/repos/ad4309e9-b291-498d-9970-8d18cc0528ef/thumbnail/?p=/image%20with%20&%20in%20filename.jpg&size=128 HTTP/2.0" 400

Downloading the file works and the Seahub web interface doesn't have that problem.

Example from nginx log for Seahub for the same file:

"GET /thumbnail/ad4309e9-b291-498d-9970-8d18cc0528ef/48/image%20with%20%26%20in%20filename.jpg HTTP/2.0" 200

Other (image) files without ampersand work fine.