iscsid(8) no longer requires scsibus(4) and sd(4) to be built-in to
the kernel. The scsi_subr module will be loaded if needed to resolve
any dependencies.

Several improvents to iscsid

- debug log is now using syslog
- seperate options for log level and foreground mode
- writes a pidfile so that /etc/rc.d/iscsid works
Now links with libutil for pidfile(), the functions login() and logout()
needed to be renamed to avoid a conflict.
- drops the nothreads option
- handles signals to shut down gracefully
- the driver may also shut down the daemon when it terminates
Currently this cannot work as the driver can only terminate when
the daemon has closed the driver file handle.

fix iSCSI RFC number

mention requirements for custom kernels.

branches: 1.10.2;
Merge riastradh-drm2 to HEAD.

Use Mt for email addresses.

branches: 1.8.2; 1.8.4;
Sort option descriptions (options without args, then options with args).

Remove trailing whitespace.

Fix up the wording of the new flags, and show that the -d flag
now takes an argument.

Use Fl for the flags.

use -n for nothreads.

make the debug level available on the command line.

branches: 1.2.2;
Fix title and xrefs.

branches: 1.1.2;
Start to move the in-kernel iSCSI initiator, kindly contributed to the
NetBSD Foundation by Wasabi Systems, from

othersrc/external/bsd/iscsi/{iscsictl,iscsid}

to

src/sbin/{iscsictl,iscsid}