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aarch64 also now can execute both 32 and 64 bit

fix typos in man pages.

Update remarks on Linux-flavored procfs.

add aarch64, and sort architecture names by alphabetical order.

these sysctl variables were removed

update information

Pull up following revision(s) (requested by sevan in ticket #1351):

	share/man/man4/man4.amiga/grf.4: revision 1.7
	share/man/man4/si.4: revision 1.11
	share/man/man8/man8.sparc/boot.8: revision 1.32
	share/man/man5/nsswitch.conf.5: revision 1.29
	share/man/man5/mixerctl.conf.5: revision 1.7
	share/man/man8/man8.vax/boot.8: revision 1.14
	share/man/man4/man4.vax/dn.4: revision 1.12
	share/man/man8/man8.vax/drtest.8: revision 1.16
	share/man/man8/sysinst.8: revision 1.6
	share/man/man4/ip.4: revision 1.37
	share/man/man5/boot.cfg.5: revision 1.28
	share/man/man1/cd.1: revision 1.10
	share/man/man4/usb.4: revision 1.106
	share/man/man4/man4.vax/ix.4: revision 1.17
	share/man/man7/security.7: revision 1.15
	share/man/man7/hier.7: revision 1.123
	share/man/man8/afterboot.8: revision 1.58
	share/man/man1/man1.x68k/bellctrl.1: revision 1.14
	share/man/man4/se.4: revision 1.6
	share/man/man4/utoppy.4: revision 1.7
	share/man/man4/midi.4: revision 1.32
	share/man/man4/cfb.4: revision 1.5
	share/man/man4/man4.sparc/magma.4: revision 1.12
	share/man/man4/audio.4: revision 1.80
	share/man/man4/isic.4: revision 1.18
	share/man/man1/cd.1: revision 1.7
	share/man/man4/envsys.4: revision 1.51
	share/man/man1/cd.1: revision 1.8
	share/man/man1/cd.1: revision 1.9
	share/man/man3/fast_divide32.3: revision 1.9
	share/man/man4/pci.4: revision 1.97
	share/man/man5/ranlib.5: revision 1.7
	share/man/man3/__arraycount.3: revision 1.7
	share/man/man4/isa.4: revision 1.46
	share/man/man8/man8.atari/ahdilabel.8: revision 1.14
	share/man/man4/chipsfb.4: revision 1.6
	share/man/man8/man8.macppc/boot.8: revision 1.8
	share/man/man5/passwd.5: revision 1.33
	share/man/man8/man8.macppc/ofwboot.8: revision 1.14
	share/man/man8/compat_linux.8: revision 1.38
	share/man/man4/iop.4: revision 1.22
	share/man/man4/ddb.4: revision 1.167
	share/man/man4/termios.4: revision 1.37
	share/man/man8/compat_freebsd.8: revision 1.18
	share/man/man5/ar.5: revision 1.9
	share/man/man7/release.7: revision 1.37
	share/man/man5/core.5: revision 1.31
	share/man/man4/ahd.4: revision 1.6
	share/man/man4/man4.vax/ad.4: revision 1.12
	share/man/man4/pppoe.4: revision 1.39
	share/man/man5/locale.alias.5: revision 1.3
	share/man/man8/man8.amiga/installboot.8: revision 1.23
	share/man/man4/etherip.4: revision 1.8
	share/man/man3/queue.3: revision 1.57
	share/man/man5/genassym.cf.5: revision 1.13
	share/man/man4/mpls.4: revision 1.10
	share/man/man1/wait.1: revision 1.5
	share/man/man5/capfile.5: revision 1.4
	share/man/man4/man4.alpha/ttwopci.4: revision 1.6
	share/man/man4/man4.atari/rtc.4: revision 1.8
	share/man/man4/gpiosim.4: revision 1.6
	share/man/man3/bitstring.3: revision 1.18
	share/man/man4/isdntel.4: revision 1.8
	share/man/man4/ai.4: revision 1.9
	share/man/man8/man8.hppa/boot.8: revision 1.2
	share/man/man4/uyurex.4: revision 1.6
	share/man/man8/man8.alpha/mkbootimage.8: revision 1.9
	share/man/man4/bpf.4: revision 1.56
	share/man/man4/man4.amiga/mfcs.4: revision 1.8
	share/man/man4/cmpci.4: revision 1.9
	share/man/man8/man8.vax/format.8: revision 1.14
	share/man/man8/compat_svr4.8: revision 1.27
	share/man/man4/crypto.4: revision 1.26
	share/man/man4/userconf.4: revision 1.13
	share/man/man4/agp.4: revision 1.17
	share/man/man9/man9.i386/bioscall.9: revision 1.10
	share/man/man4/uftdi.4: revision 1.20
	share/man/man4/radio.4: revision 1.13
	share/man/man4/mfb.4: revision 1.5
	share/man/man7/ascii.7: revision 1.8
	share/man/man4/man4.vax/dl.4: revision 1.13
	share/man/man4/ral.4: revision 1.12
	share/man/man4/unix.4: revision 1.26
	share/man/man4/edc.4: revision 1.12
	share/man/man4/pim.4: revision 1.5
	share/man/man8/compat_ultrix.8: revision 1.21
	share/man/man4/dge.4: revision 1.11
	share/man/man8/diskless.8: revision 1.32
	share/man/man5/passwd.conf.5: revision 1.11
	share/man/man8/man8.acorn26/boot26.8: revision 1.8
	share/man/man4/man4.vax/hy.4: revision 1.12
	share/man/man4/plip.4: revision 1.4
	share/man/man4/sc.4: revision 1.8
	share/man/man4/ec.4: revision 1.14
	share/man/man4/man4.sgimips/giopci.4: revision 1.9
	share/man/man7/sysctl.7: revision 1.114
	share/man/man3/bits.3: revision 1.18
	share/man/man4/we.4: revision 1.19
	share/man/man8/compat_sunos.8: revision 1.21
	share/man/man4/ip6.4: revision 1.31
	share/man/man4/acpilid.4: revision 1.8
	share/man/man4/man4.dreamcast/aica.4: revision 1.6
	share/man/man4/mfi.4: revision 1.12
	share/man/man4/ugen.4: revision 1.32
	share/man/man4/jme.4: revision 1.7
	share/man/man4/man4.sparc64/intro.4: revision 1.5
	share/man/man4/zyd.4: revision 1.5
	share/man/man4/gre.4: revision 1.45
	share/man/man3/bitmap.3: revision 1.10
	share/man/man4/man4.vax/cons.4: revision 1.12
	share/man/man3/gcq.3: revision 1.4
	share/man/man4/man4.hppa/pdc.4: revision 1.3
	share/man/man4/multicast.4: revision 1.8
	share/man/man4/man4.sparc/intro.4: revision 1.27
	share/man/man4/ath.4: revision 1.32
	share/man/man4/ym.4: revision 1.19
	share/man/man3/iso646.3: revision 1.6
	share/man/man4/btsco.4: revision 1.13
	share/man/man4/man4.i386/ndis.4: revision 1.6
	share/man/man4/pad.4: revision 1.6
	share/man/man4/strip.4: revision 1.16
	share/man/man8/man8.x86/boot.8: revision 1.12
	share/man/man4/amr.4: revision 1.15
	share/man/man4/ieee80211.4: revision 1.5
	share/man/man4/options.4: revision 1.467
	share/man/man5/link.5: revision 1.24
	share/man/man8/man8.cobalt/boot.8: revision 1.10
	share/man/man5/stab.5: revision 1.15
	share/man/man3/tree.3: revision 1.12
	share/man/man4/route.4: revision 1.31
	share/man/man4/man4.sun3/leds.4: revision 1.13
	share/man/man4/bluetooth.4: revision 1.20
	share/man/man4/man4.i386/pcibios.4: revision 1.19
	share/man/man5/veriexec.5: revision 1.8
	share/man/man7/operator.7: revision 1.12
	share/man/man4/man4.hp300/dcl.4: revision 1.13
	share/man/man4/man4.i386/intro.4: revision 1.31
	share/man/man5/ld.so.conf.5: revision 1.21
	share/man/man8/man8.alpha/boot.8: revision 1.16
	share/man/man4/bio.4: revision 1.13
	share/man/man4/man4.sun2/leds.4: revision 1.10
	share/man/man8/man8.x86/mbr.8: revision 1.4
	share/man/man8/man8.mvme68k/boot.8: revision 1.9
	share/man/man4/man4.alpha/ttwoga.4: revision 1.6
	share/man/man4/ahc.4: revision 1.34

Direct reader to shell documentation generally, rather than csh(1)
specifically.

Mention variables OLDPWD and PWD.

Move the text that explains that cd(1) is a shell built-in to the very
beginning of the description where it can be seen prominently.

Improve formatting.

 -

Remove workaround for ancient HTML generation code.
Use EXIT STATUS and .Ex.

Wording improvements for previous from maxv.

Mention that linux and linux32 emulations are not loaded automatically
for modular kernels, and mention how to enable that. Bump date.

Remove workaround for ancient HTML generation code.

sync with head

Switch from .nf/.fi groff macros to .Bd -literal/.Ed blocks.
While here, convert .sp macro to .Pp.

ok wiz@.

sync with HEAD

Add comma in enumeration.

Use Nx and Ap. filesystem -> file system.

Add amd64 to the list of ports that support linux emulation.
Note that the emulation root is linux32 when running i386 linux programs
  on an amd64 system.
Note that paths that start /../ are only looked up in the real root.
Modify the bug/note about symlinks not being looked up in the emulation root.
Some of this stuff ought to be in a generic 'emulation' man page.

mention linux makedev

Drop trailing space.

Pullup revs 1.27-1.30 (requested by manu in ticket #1444)

Replaced /proc with /emul/linux/proc. Some minor grammar fixes too.

Bump date for previous.

The sentence explaining programs using /proc are unsupported is misleading:
we support them using -o linux option of mount_proc. Remove it.

New sentence, new line; use .Aq; set -> set up.

NetBSD -> .Nx.

Replaced /proc with /emul/linux/proc. Some minor grammar fixes too.
Okay'ed by wiz.

Document that COMPAT_LINUX works on arm as well.
While we're here, downcase all the architecture names and put them in
alphabetical order.

Generate <>& symbolically. I'm avoiding .../dist/... directories for now.

Bd -literal instead of -unfilled.

add info on setting procfs

Remove some superfluous .Pps.

Update comment about svgalib binaries, with help by Frank van der Linden.

Improve comment about /proc-fs, both stylistically as semantically.

Formatting improvements.

On the PowerPC, ldd now works, hence the removal from the BUGS section

Added info about non i386 ports

mention the suse_linux pkg

Fix spelling of separate.

More and more .Os cleanups.  .Os is defined in the tmac.doc-common file,
so we shouldn't override it with versions in the manpages.  Many more to
come.

reference nsswitch.conf(5) as necessary
change references from YP to NIS.

Update to note linux_lib-2.5

Principally, change foo(N) to .Xr foo N
Also, do some other mdoc tagging.

macroize BSD, NetBSD, FreeBSD and misc cleanup

Sync w/ trunk.

NetBSD, not BSD4.

Note what to do in the rare case that dirent system calls fail because
of > 32 bit offset cookies: point to the mount_nfs -X option (or -2
option).

Update to note a linux_lib-2.4.tar.gz is available from the
FreeBSD folks.

Update to note that sound now mostly works, and to list the FreeBSD
URL to retrieve an easy to use tar file of Linux libraries etc.

lowercase manpage names (.Nm); fixes PR 3218.
also cleaned up some .Nm usage and other problems.

Note that nsswitch.conf is needed on newer Linux systems; document that
pathnames pointed to by symlinks are not resolved through /emul/linux.

From Bob Baron.

document that EXEC_AOUT and EXEC_ELF{32,64} need to be specified a kernel
options to get support for those executable types.  (Actually, EXEC_ELF64
isn't supported by these emulations yet, but in theory, eventually, it
should work, so i've documented it.)

Sync with reality (from main tree)

Sync with reality.

COMPAT_LINUX manual page. Mainly describes how to deal with Linux shared
libraries.