Initialize sockaddr_storage to all ones

recvmsg sometimes fails to set the peer name, even on success.
Pre-initializing this value to all ones should be a safe guard as it's
not a valid address family.

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Signed-off-by: Matt Benjamin <matt@linuxbox.com>
Have recv fail if we have a bogus client address

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Signed-off-by: Matt Benjamin <matt@linuxbox.com>