Fixes for make dist

Reduce the usage of EXTRA_DIST. If files are conditionally included in
_SOURCES, _HEADERS etc, automake is smart enough to dist all files that
could possibly be included, but this does not apply to EXTRA_DIST,
resulting in make dist depending on the configuration.

Add some files that were missing altogether in various Makefile's.

The changes to disted files in this commit (excluding deleted files):

+./cmd/zed/agents/README.md
+./etc/init.d/README.md
+./lib/libspl/os/freebsd/getexecname.c
+./lib/libspl/os/freebsd/gethostid.c
+./lib/libspl/os/freebsd/getmntany.c
+./lib/libspl/os/freebsd/mnttab.c
-./lib/libzfs/libzfs_core.pc
-./lib/libzfs/libzfs.pc
+./lib/libzfs/os/freebsd/libzfs_compat.c
+./lib/libzfs/os/freebsd/libzfs_fsshare.c
+./lib/libzfs/os/freebsd/libzfs_ioctl_compat.c
+./lib/libzfs/os/freebsd/libzfs_zmount.c
+./lib/libzutil/os/freebsd/zutil_compat.c
+./lib/libzutil/os/freebsd/zutil_device_path_os.c
+./lib/libzutil/os/freebsd/zutil_import_os.c
+./module/lua/README.zfs
+./module/os/linux/spl/README.md
+./tests/README.md
+./tests/zfs-tests/tests/functional/cli_root/zfs_clone/zfs_clone_rm_nested.ksh
+./tests/zfs-tests/tests/functional/cli_root/zfs_send/zfs_send_encrypted_unloaded.ksh
+./tests/zfs-tests/tests/functional/inheritance/README.config
+./tests/zfs-tests/tests/functional/inheritance/README.state
+./tests/zfs-tests/tests/functional/rsend/rsend_016_neg.ksh
+./tests/zfs-tests/tests/perf/fio/sequential_readwrite.fio

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10501

lib/libzfs_core/Makefile.am

@@ -5,7 +5,7 @@ lib_LTLIBRARIES = libzfs_core.la
 USER_C = \
 	libzfs_core.c
 
-nodist_libzfs_core_la_SOURCES = $(USER_C)
+libzfs_core_la_SOURCES = $(USER_C)
 
 libzfs_core_la_LIBADD = \
 	$(top_builddir)/lib/libnvpair/libnvpair.la \
@@ -18,4 +18,3 @@ libzfs_core_la_LIBADD += -lutil -lgeom
 else
 libzfs_core_la_LDFLAGS = -version-info 1:0:0
 endif
-EXTRA_DIST = $(USER_C)

lib/libzfs_core/libzfs_core_compat.h

@@ -1,47 +0,0 @@
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-
-/*
- * Copyright (c) 2013 by Martin Matuska <mm@FreeBSD.org>. All rights reserved.
- */
-
-#ifndef	_LIBZFS_CORE_COMPAT_H
-#define	_LIBZFS_CORE_COMPAT_H
-
-#include <libnvpair.h>
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/fs/zfs.h>
-#include <sys/zfs_ioctl.h>
-
-#ifdef	__cplusplus
-extern "C" {
-#endif
-
-int lzc_compat_pre(zfs_cmd_t *, zfs_ioc_t *, nvlist_t **);
-void lzc_compat_post(zfs_cmd_t *, const zfs_ioc_t);
-int lzc_compat_outnvl(zfs_cmd_t *, const zfs_ioc_t, nvlist_t **);
-
-#ifdef	__cplusplus
-}
-#endif
-
-#endif	/* _LIBZFS_CORE_COMPAT_H */