System upgrade almost always requires user input.

code cleanups

apt-get uses similar code.

And log a message to syslog when we update the package list.

To re-open database - else we get old/cached entries.

Fetching changelog at server side avoids security problems at
client (Same-Origin-Policy).

And avoid to use debian version, because that changes over time and
it is clumsy to keep in sync.

Signed-off-by: Stefan Priebe <s.priebe@profihost.ag>

Currently when we open a new summary panel

- we display the rrd with default hour timeframe
- then we refresh it
- then we update from timeframe selector

With this patch:
- We display the rrd with timeframe from selector, or if not defined default hour
- We update from timeframe selector value if timeframe && cf are differents from current value
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>

Java archives (.jar) are simple zip files - already compressed.

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>

This can be used for the new async qemu config API.

Only enable timeouts when we really expect data to be send/received.