Move connect/disconnect logs to verbose level

[vanyarock01]

Now when I use xqueue in app i got many repeated logs:

main/1398/main I> disconnected 10.3.0.200:49778, sid=9554, fid=1398
main/1397/main I> connected 10.3.0.200:49896, sid=9555, fid=1397
main/8198/main I> tasks: disconnected nil, sid=53973, fid=8198

In the common case these logs not needed. But they make it harder to read other logs.

I think we can move it to verbose level.

[vanyarock01]

In newer version two of these logs moved to debug, okay. I think i can to move the last one to verbose or debug