Move the dom_dispose and pru_detach calls in sofree() earlier. Only after calling pru_detach we can be absolutely sure, that we don't have any references to the socket in the stack.
Move the dom_dispose and pru_detach calls in sofree() earlier. Only after
calling pru_detach we can be absolutely sure, that we don't have any
references to the socket in the stack.

This closes race between lockless sbdestroy() and data arriving on socket.

Reviewed by:	rwatson

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