Fix .In abuse and a wrong include path in three manual pages.

syscall.9: Add some missing info and fix outdated contents

* Update the syscall decleration (in syscalls.master) and generated
prototype (in sysproto.h) examples to match the current syntax.
* Fix

syscall.9: Add some missing info and fix outdated contents

* Update the syscall decleration (in syscalls.master) and generated
prototype (in sysproto.h) examples to match the current syntax.
* Fix 'uap->sysmsg_result' to 'sysmsg->sysmsg_result', and be explicit
that the function need to return 0 when the default 'sysmsg_result' is
updated.
* Don't mention the 'SCARG' macro (to extract syscall argument) since
it's now seldomly used in our codebase. (Syscall argument can be
intuitively extracted by 'uap->arg'.)
* Add a paragraph to describe the symbol exportation in libc via the
'libc/sys/Symbol.map' file.
* Mention the syscall entry point in the kernel a bit.
* Add 'sys/sys/sysmsg.h' and 'sys/sys/sysunion.h' to the FILES section,
while remove the obsolete 'sys/kern/syscalls.conf' (already folded
into makesyscalls.sh).
* Some minor formatting and wording tweaks.

Reviewed-by: swildner

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syscall.9: Adjust for the makesyscalls.sh changes.

syscall.9: Explain better how errno and return value are set in userland.

In-discussion-with: peeterm, zrj

kernel, world - Remove the remaining vestiges of linux emul

* Remove the remaining bits of the 32-bit linux emulation code. This
code hasn't been used in ages and we have no plans to implement a

kernel, world - Remove the remaining vestiges of linux emul

* Remove the remaining bits of the 32-bit linux emulation code. This
code hasn't been used in ages and we have no plans to implement a
64-bit linux emulation.

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i386 removal, part 42/x: Remove i386 info from the syscall(9) manpage.

syscall.9: Add a rough explanation of how a syscall ends up in the kernel.

Remove the <sys/syscall-hide.h> header file.

Nothing includes it, nor are the HIDE_BSD() and HIDE_POSIX() macros
actually defined anywhere.

Also, remove support for the associated POSIX, BSD and NO

Remove the <sys/syscall-hide.h> header file.

Nothing includes it, nor are the HIDE_BSD() and HIDE_POSIX() macros
actually defined anywhere.

Also, remove support for the associated POSIX, BSD and NOHIDE keywords
from the syscalls.master files. It makes the patch quite large due to
touching most lines in the syscalls.master files but it results in
zero changes in the generated files.

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Initial import of binutils 2.22 on the new vendor branch

Future versions of binutils will also reside on this branch rather
than continuing to create new binutils branches for each new version.

Add syscall.9 adapted from OpenBSD.

Reviewed-by: swildner@

syscall.9: Some minor mdoc adjustments.

syscall.9: Fix pathname.