vsudd: Reduce logging
vsudd: Reduce logging

Previously the logs for a single connection would be something like:

2016/05/04 12:44:41 171 Accepted connection on fd 5 from 00000002.00010006
2016/05/04 12:44:41 171 Connected to docker &{{0xc82008a5b0}}
2016/05/04 12:44:44 171 copying from vsock to docker:  4465 bytes done
2016/05/04 12:44:44 171 copying from docker to vsock:  1324 bytes done
2016/05/04 12:44:44 171 Done. read: 4465 written: 1324
2016/05/04 12:44:44 171 Closing docker &{{0xc82008a5b0}}
2016/05/04 12:44:44 171 Closing vsock &{0xc820086840}

The "Connected" and "Closing" lines are not useful now that it is debugged and
working well. The "copying..." lines are redundant with the "Done" line. Reduce
to just:

2016/05/04 14:00:41 4 Accepted connection on fd 10 from 00000002.00010003
2016/05/04 14:00:41 4 Done. read: 90 written: 145

Signed-off-by: Ian Campbell <9be92b3dbbd6611e3e4c9209fb3d04b4919e7cca@docker.com>

davefreitag/linuxkit,davefreitag/linuxkit,t-koulouris/linuxkit,ndauten/linuxkit,JohnnyLeone/linuxkit,JohnnyLeone/linuxkit,kencochrane/linuxkit,linuxkit/linuxkit,YuPengZTE/linuxkit,radu-matei/linuxkit,rn/linuxkit,yankcrime/linuxkit,djs55/linuxkit,eyz/linuxkit,YuPengZTE/linuxkit,konstruktoid/linuxkit,ndauten/linuxkit,rn/linuxkit,furious-luke/linuxkit,radu-matei/linuxkit,deitch/linuxkit,konstruktoid/linuxkit,davefreitag/linuxkit,eyz/linuxkit,eyz/linuxkit,thebsdbox/linuxkit,t-koulouris/linuxkit,mor1/linuxkit,ndauten/linuxkit,kencochrane/linuxkit,YuPengZTE/linuxkit,deitch/linuxkit,deitch/linuxkit,kencochrane/linuxkit,thebsdbox/linuxkit,YuPengZTE/linuxkit,justincormack/linuxkit,davefreitag/linuxkit,djs55/linuxkit,samoht/linuxkit,thebsdbox/linuxkit,linuxkit/linuxkit,t-koulouris/linuxkit,davefreitag/linuxkit,thebsdbox/linuxkit,linuxkit/linuxkit,radu-matei/linuxkit,justincormack/linuxkit,radu-matei/linuxkit,justincormack/linuxkit,djs55/linuxkit,zx2c4/linuxkit,rn/linuxkit,kencochrane/linuxkit,eyz/linuxkit,JohnnyLeone/linuxkit,konstruktoid/linuxkit,YuPengZTE/linuxkit,deitch/linuxkit,djs55/linuxkit,samoht/linuxkit,yankcrime/linuxkit,mor1/linuxkit,kencochrane/linuxkit,ndauten/linuxkit,zx2c4/linuxkit,furious-luke/linuxkit,samoht/linuxkit,samoht/linuxkit,yankcrime/linuxkit,djs55/linuxkit,justincormack/linuxkit,konstruktoid/linuxkit,yankcrime/linuxkit,deitch/linuxkit,JohnnyLeone/linuxkit,JohnnyLeone/linuxkit,rn/linuxkit,konstruktoid/linuxkit,mor1/linuxkit,yankcrime/linuxkit,ndauten/linuxkit,zx2c4/linuxkit,mor1/linuxkit,eyz/linuxkit,linuxkit/linuxkit,ndauten/linuxkit,rn/linuxkit,YuPengZTE/linuxkit,konstruktoid/linuxkit,justincormack/linuxkit,radu-matei/linuxkit,zx2c4/linuxkit,linuxkit/linuxkit,t-koulouris/linuxkit,eyz/linuxkit,furious-luke/linuxkit,mor1/linuxkit,zx2c4/linuxkit,thebsdbox/linuxkit,yankcrime/linuxkit,kencochrane/linuxkit,furious-luke/linuxkit,justincormack/linuxkit,furious-luke/linuxkit,t-koulouris/linuxkit,thebsdbox/linuxkit,samoht/linuxkit