I/O ktrace of sendsyslog(2) did not work.  As uiomove() adjusts iov_len to 0, we need a propper length calculation.  While there, use -1 for the file descriptor because 0 is reserved for stdin. OK deraadt@ guenther@
I/O ktrace of sendsyslog(2) did not work.  As uiomove() adjusts
iov_len to 0, we need a propper length calculation.  While there,
use -1 for the file descriptor because 0 is reserved for stdin.
OK deraadt@ guenther@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars