Make libstand setjmp work for both 64- and 32-bit ABIs.
Catch up on r261590.
Provide macros that allow easily export uma(9) zone limits and
current usage via sysctl(9):

  SYSCTL_UMA_MAX()
  SYSCTL_ADD_UMA_MAX()
  SYSCTL_UMA_CUR()
  SYSCTL_ADD_UMA_CUR()

Sponsored by:	Nginx, Inc.
Utilize SYSCTL_UMA_CUR() to export usage of syncache and
tcp reassembly zones.

Sponsored by:	Nginx, Inc.
sysctl_handle_counter_u64() doesn't use arg2 argument, thus simplify
the SYSCTL_COUNTER_U64() macro.

Sponsored by:	Nginx, Inc.
Remove references to PHYSADDR where it's used only in debugging output,
and where the code that references it can safely be elided if it's not
defined (meaning the code is used for legacy arm platforms that still
define the compile-time PHYSADDR but not on newer systems that calculate
the value at runtime).
Add manual page for wsp driver.

MFC after:	1 week
Update atp driver manual page.
Moused is now started automatically by devd.

MFC after:	1 week
The atp USB driver is generic and its manual page should be available
for all platforms. Add wsp manual page to build.

MFC after:	1 week