sync-mode: print errno message on failure

I have observed this message several times:

 [ERROR] can't open channel socket
 [ERROR] initialization failed

which is very difficult to understand.

The errno message should help this to be a bit more explicit.
With this patch, in the case of wrong interface:

 [ERROR] can't open channel socket: No such device
 [ERROR] initialization failed

Signed-off-by: Arturo Borrero Gonzalez <arturo@debian.org>
Signed-off-by: Florian Westphal <fw@strlen.de>

0 files changed, 0 insertions, 0 deletions