Remove my middle name.

Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

r343881 had an uninitialized error. This fixes that.

PR: 233849
Reported by: Andre Albsmeier
MFC after: 1 month
Sponsored by: iXsystems Inc
Differential Revision: https://reviews.freebsd.org/D18785

r339008 broke repquota for UFS. This rectifies that.

Refactor the function calls and tests so that, on UFS, the proper fields
are filled out.

PR: 233849
Reported by: Andre Albsmeier
Reviewed by: mav, delphij
MFC after: 1 month
Sponsored by: iXsystems Inc
Differential Revision: https://reviews.freebsd.org/D18785

Ensure buffer is nul-terminated.

MFC after: 2 weeks

This exposes ZFS user and group quotas via the normal
quatactl(2) mechanism. (Read-only at this point, however.)
In particular, this is to allow rpc.rquotad query quotas
for NFS mounts, allowing users to see their quotas on the
hosts using the datasets.

The changes specifically:

* Add new RPC entry points for querying quotas.
* Changes the library routines to allow non-UFS quotas.
* Changes rquotad to check for quotas on mounted filesystems,
rather than being limited to entries in /etc/fstab
* Lastly, adds a VFS entry-point for ZFS to query quotas.

Note that this makes one unavoidable behavioural change: if quotas
are enabled, then they can be queried, as opposed to the current
method of checking for quotas being specified in fstab. (With
ZFS, if there are user or group quotas, they're used, always.)

Reviewed by: delphij, mav
Approved by: mav
Sponsored by: iXsystems Inc
Differential Revision: https://reviews.freebsd.org/D15886

lib: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Use strlcpy() instead of strncpy() to ensure that qf->fsname is NUL
terminated. Don't bother checking for truncation since the subsequent
stat() call should detect that and fail.

Reported by: Coverity
CID: 1018189
MFC after: 1 week

libutil: Use O_CLOEXEC for internal file descriptors from open().

Replace index() and rindex() calls with strchr() and strrchr().

The index() and rindex() functions were marked LEGACY in the 2001
revision of POSIX and were subsequently removed from the 2008 revision.
The strchr() and strrchr() functions are part of the C standard.

This makes the source code a lot more consistent, as most of these C
files also call into other str*() routines. In fact, about a dozen
already perform strchr() calls.

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Debugging nits found while testing the new 64-bit quota code.

Add and document the quota_convert function which converts between the
old 32-bit and the new 64-bit formats.

Minor bugs turned up during conversion of quotacheck.

Add and document new quoat_on and quota_off functions.

Add quota_maxid which returns the maximum user (or group) identifier
in an associated quotafile. Needed by repquota.

Bug fix in quota_read.

Further extend the quotafile API.

Style

Update the quotafile library to manage both active quotas via the
quotactl(2) interface and inactive quotas by accessing the quota
files directly.

Update the edquota program to use this new interface as proof of
concept.

Make hasquota thread safe.

Move hasquota() function to libutil.

Bug fixes found from using these functions in edquota.

WIP