Fixed wrong FD_COPY usage.

Actual macro has dest and src switched.

Change-Id: I4a8e0f32fb85f4efece0b325c8ceea22cf1b42aa
Fixed remote socket fallback if can't bind.

Change-Id: I0f9c1bf7eee52c22550dcb5d9946fba4ecf91ad5
Ignore responses in UDP handler.

Change-Id: I8d128c3408a794f0ad183e15e20a3afa31989e88
Disabled SO_REUSEADDR as it may lead to wierd errors when misconfigured.

Change-Id: Ica5b201351cf9c0d9bb69c052796c2ed38873e6a