Networking: setsockopt() fails when setting timeouts to values less that an...

Networking: setsockopt() fails when setting timeouts to values less that an 100 msec.  That is because the timeout is limited to stops of 1 decisecond and because the conversion of structure timeval was truncating the microsecond remainder.  The utility net_timeval2dsec now accespts and option to determin how it handles the remainder:  truncate, discarding the remainder, use the remainder to round to the closed decisecond value, or use any non-zero remainder to the next larger whole decisecond value.

For the setsockopt() case, it will always use the final option.  This means that a time of zero (i.e., not timeout) can only occur if the value zero was explicated provided to setsockopt().