Do not redefine ZFS_DEBUG_STR

We now have ZOL's definition of ZFS_DEBUG_STR in zfs_ioctl.c, so
there is no need to define ZFS_DEBUG_STR ourselves.
Fix debug build.
Remove old OPPLE pipe sending code.
Change ioc_send_new to use getf/releasef, although not in use yet.
Merge branch 'master' of github.com:openzfsonosx/zfs
Remove ZFS_INIT_LAUNCHD_REVERSE_DNS and clean up whitespace
Fixes config=kernel build by not including launchd-daemons.am

Only include launchd-daemons.am when --with-config=user|all.
Model the ioctl registration like upstread, with new-style and legacy.
Attempt to make most closer to reference.
Requires SPL TSD support.
Set the ioc_error code in the passed args instead of the freed pointer.
Actually call secpolicy functions
Cleaning up whitespace in zfsdev_ioctl()
Move gettext() and dgettext() into libintl.h
Clean up zfs_vfsops.c #include's
Silence warnings in empty function
Do not create zvol symlinks unless we have the bsdname

Also, only print "Attempting to eject volume," if we are are
actually trying to eject the volume.

This resolves a bug where we were creating symlinks to /dev when
bsdname came back null due to the zvol's being readonly.

This does not resolve whatever limitation is causing readonly
zvols not to get assigned a disk at all.
Fix EBUSY bug for zfs inherit while mounted

We don't handle MNTOPT_REMOUNT and it seems to be unecessary on
OS X, since the output of '/sbin/mount' shows the inherited
changes properly as they occur.

We can revisit whether this is necessary if we ever start using
MNT_UPDATE to do all of our property changes.
Quick non-root warning to users, because, we care.
Allow commands that can succeed without root priv to do so.
Support legacy mountpoints
Bringing in illumos's manual_mount() and manual_unmount() allows us
to support mountpoint=legacy. As in FreeBSD, manual_mount calls a
new function zmount(), which has the same arguments as illumos's
mount() function. zfs_mount() in libzfs now calls zmount() as well.

manual_mount() is called if the name of the binary is 'mount_zfs',
and we hardlink 'mount_zfs' to the standard 'zfs' command. This
differs from upstream use of the name 'mount' because OS X will
pass through calls to mount -t somefs to mount_somefs.

zfs_mount_args is moved out of zfs_context.h and into its own file
zfs_mount.h so that zmount() can live in libspl without needing to
include the entire zfs_context.h. The illumos-compatible flags
MS_OVERLAY, MS_FORCE, etc. are moved here, as well.

zfs_mount_args is expanded to allow zmount to pass in the option
string to the kernel for processing (not implemented here). Also,
in zfs_mount_args an illumos compatible variable named 'mflag'
replaces the OS X compatible variable named 'flags'. The
translation from the illumos compatible flags (MS_*) to OS X
compatible flags (MNT_*) is now handled in the kernel in
zfs_vfs_mount(). To complete this change, instances in userland
where we were using MNT_* flags are switched to their MS_*
counterparts. Going forward, this should simplify porting insofar
as we can for the most part stick to the upstream MS_* flags in
userland. The major exception is in getmntany where getfsstat()
will return statfs structs with the variable f_flags, which uses
MNT_* flags.

A memory leak has been fixed in zfs_vfs_mount(), where we were
allocating 'osname' but not freeing it.

Since we print "Mount successful" in changelist_postfix() when a
previously mounted file system is re-mounted, changelist_postfix()
cannot trust zfs_mount()'s return value. zfs_mount() can return 0
even if the file system did not actually mount, as is the case for
file systems with legacy mountpoints. To avoid being misleading,
we now check that the value of the property ZFS_PROP_MOUNTED is
"yes" before declaring "Mount successful" in changelist_postfix().
Coding Style changes to adhere to scripts/cstyle.pl
zfs_znode.c four space continuation indentation
Fix include of zfeature_common.h in libzfs_utl.c