If nameserver register pkt is dropped, error out

The earlier version had a retry, but now the onus of retrying is on the
application. We just error out after a fixed amount of time instead of
waiting indefinitely or retrying a number of times.
Zero out the buffer we are going to read into
Stream migration now works on server side also.
Merge branch 'intrinsic_security' of github.com:XIA-Project/xia-core into intrinsic_security