Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r271445,r271446,r271560:
Improve markup and language throughout the ctl.conf man page

MFC r271543:
Add the new iscsi(4) man page
Cross reference it from iscsid(8) and iscsictl(8)

Approved by: re (gjb), bcr (mentor)

MFC r267614:

Add "iscsictl -M", which allows one to change session parameters
without removing it and adding back.

Sponsored by: The FreeBSD Foundation

Merge r268842 from head:

Fix two typos in iscsictl.8

PR: 191581
Submitted by: Jimmy Olgeni

MFC r264876:

Grammar fix.

MFC r262247:

Make it clear that there are two ways to add a session using iscsictl(8),
and some options require configuration file.

Sponsored by: The FreeBSD Foundation

MFC r260255:

Properly document -u and -s.

Sponsored by: The FreeBSD Foundation

MFC r260106:

The devd part never got implemented; remove for now, until someone actually
needs this feature and can talk to me about how it should look like.

Sponsored by: The FreeBSD Foundation

MFC r260105:

Fix typo.

Sponsored by: The FreeBSD Foundation

MFC r257379:

Rename '-h' option to '-p', and use "portal" instead of "host" or "address",
in order to be consistent with iSCSI terminology. Besides, calling the
option '-h' was just wrong.

This changes usage for newly added iscsictl(8), and two newly added
subcommands to ctladm(8). This breaks POLA between CURRENT and 10,
but since 10.0 has not been released yet, it's still ok to do.

MFC r257380:

Bump .Dd after r257379.

Approved by: re (glebius)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Minor mdoc fixes.

Approved by: re (blanket)

Bring in the new iSCSI target and initiator.

Reviewed by: ken (parts)
Approved by: re (delphij)
Sponsored by: FreeBSD Foundation