Optional update for nextcloud-client

This update for nextcloud-client to version 2.3.3 contains various bug fixes (boo#1076244):

- client and protocol bug fixes
- GUI improvements and icon updates
- fixes for client crashes
- Improve compatibility with server 10.0
- owncloudcmd: Align process return value with sync return value

Fixed bugs
bnc#1076244
nextcloud client still 2.3.1 but 2.3.2 has fixes
Selected Binaries
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