DAVdroid fail to connect to URL containing "~"

[AutoImport-dobek]

STEPS
Try connect to https://example.com/~user/owncloud/remote.php/caldav/

RESULT:
"HTTP error: 403 Forbidden"

No problems to connect using desktop browser.

[rfc2822]

Duplicate of #80.

Please see also Why tilde (~) should not be used in Web addresses (URLs).