Client should have option to send update on packages installed to server

[jheiss]

Currently the client only sends an update to the server about what packages are currently installed at the end of an install/update/remove operation. It would be nice if the client had a command line option to send an update.

If the server is unavailable when an install/update/remove operation occurs then that update to the server will be lost. If the client doesn't have frequent install/update/remove operations then its state as recorded on the server may be incorrect for a long time. Users might want a way to update that state on the server manually or via cron without having to perform an install/update/remove operation.

Was: https://sourceforge.net/apps/trac/tpkg/ticket/38