fail gracefully if system DBus unreachable (#1403)

System bus (DBus) is only required for optional features (non-permanent
connection to jabber server, removable media, etc.), so fail gracefully
(but output errors to logs) if it is unreachable.

This aids testing Sugar inside chroots.

Tested:
- inside chroot (no system bus): errors in log, neighbourhood shows buddies
- on XO-1 (regular session, no NM): no errors, neighbourhood shows buddies, battery shown
- on XO-1 (regular session, NM): no errors, neighbourhood shows buddies and networks, battery shown, disconnecting + automatic reconnect works, shutdown works

Signed-off-by: Sascha Silbe <sascha@silbe.org>

0 files changed, 0 insertions, 0 deletions