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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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

fusefs: fix two bugs regarding VOP_RECLAIM of the root inode

* We never send FUSE_LOOKUP for the root inode, since its inode number
is hard-coded to 1. Therefore, we should not send FUSE_FORGET for it,
lest the server see its lookup count fall below 0.

* During VOP_RECLAIM, if we are reclaiming the root inode, we must clear
the file system's vroot pointer. Otherwise it will be left pointing
at a reclaimed vnode, which will cause future VOP_LOOKUP operations to
fail. Previously we only cleared that pointer during VFS_UMOUNT. I
don't know of any real-world way to trigger this bug.

MFC after: 2 weeks
Reviewed by: pfg
Differential Revision: https://reviews.freebsd.org/D34753

fusefs: add SVN Keywords to the test files

Reported by: SVN pre-commit hooks
MFC after: 15 days
MFC-With: r350665
Sponsored by: The FreeBSD Foundation

fusefs: fix warnings in the tests reported by GCC

Sponsored by: The FreeBSD Foundation

fusefs: don't leak memory of unsent operations on unmount

Sponsored by: The FreeBSD Foundation

fusefs: add some explicit tests for FUSE_FORGET

Sponsored by: The FreeBSD Foundation

fusefs: prefer FUSE_ROOT_ID to literal 1 in the tests

Sponsored by: The FreeBSD Foundation

fusefs: support kqueue for /dev/fuse

/dev/fuse was already pollable with poll and select. Add support for
kqueue, too. And add tests for polling with poll, select, and kqueue.

Sponsored by: The FreeBSD Foundation

fusefs: fix intermittency in the Destroy.ok test

The handler for FUSE_DESTROY must shut down the daemon.

Sponsored by: The FreeBSD Foundation

fusefs: Finish supporting -o default_permissions

I got most of -o default_permissions working in r346088. This commit adds
sticky bit checks. One downside is that sometimes there will be an extra
FUSE_GETATTR call for the parent directory during unlink or rename. But in
actual use I think those attributes will almost always be cached.

PR: 216391
Sponsored by: The FreeBSD Foundation

fusefs: WIP supporting -o default_permissions

Normally all permission checking is done in the fuse server. But when -o
default_permissions is used, it should be done in the kernel instead. This
commit adds appropriate permission checks through fusefs when -o
default_permissions is used. However, sticky bit checks aren't working yet.
I'll handle those in a follow-up commit.

There are no checks for file flags, because those aren't supported by our
version of the FUSE protocol. Nor is there any support for ACLs, though
that could be added if there were any demand.

PR: 216391
Reported by: hiyorin@gmail.com
Sponsored by: The FreeBSD Foundation

fusefs: adapt the tests to the fuse => fusefs rename

Sponsored by: The FreeBSD Foundation