MFC r262912

cddl/contrib/opensolaris/lib/libuutil/common/uu_avl.c
	Fix a memory leak in uu_avl_pool_create: pthread_mutex_init without
	a corresponding pthread_mutex_destroy.  It shows up, among other
	places, when doing "zfs list".
MFC r263475:
Fix two issues with /dev/mem access on amd64, both causing kernel page
faults.

First, for accesses to direct map region should check for the limit by
which direct map is instantiated.

Second, for accesses to the kernel map, use a new thread private flag
TDP_DEVMEMIO, which instructs vm_fault() to return error when fault
happens on the MAP_ENTRY_NOFAULT entry, instead of panicing.

MFC r263498:
Add change forgotten in r263475.  Make dmaplimit accessible outside
amd64/pmap.c.
MFC r262914

sbin/devd/devd.8
sbin/devd/devd.cc
	Add a -q flag to devd that will suppress syslog logging at
	LOG_NOTICE or below.
MFC:	r263435

Add new CPUTYPEs supported by Clang 3.4.
MFC of 263901, tzdata2014b

 - Update antartica.
 - Comments about historical data for Hawaii.
 - Update details for Crimea on 30 March
 - Move location data Simferopol.
MFC r263774:

Revert r263694, and apply a better fix to squelch unnecessary warnings
from clang about possible keywords being treated as identifiers for the
remainder of the translation unit (a.k.a. -Wkeyword-compat), when using
libstdc++ in combination with -Wsystem-headers.  This will not only fix
devd, but any C++ program using libstdc++.
MFC r260880 (by kaiw, from projects/elftoolchain):

  * Make die_mem_offset() be able to handle DW_AT_data_member_location
    attributes generated by Clang 3.4.
  * Document how different compilers generate DW_AT_data_member_location
    attributes differently.
  * Document the quirks about DW_FORM_data[48].

This is a slightly modified version, adapted to work with the old
libdwarf in stable/9 and stable/10.  It should fix DTrace on these
branches, when the kernel is compiled with clang 3.4.

Note that you have to build *and* install the CTF tools first, before
building the kernel.  Otherwise you can possibly still get error
messages similar to "failed to copy type of 'pr_uid': Type information
is in parent and unavailable", when attempting to run dtrace(1).

Submitted by:	kaiw
MFC r263937:

  Give hint on how to disable the default repository.
MFC r263129:

  Combine similar code from vprintf(9) and log(9).
MFC r263130:

  Fix -o size less than PAGE_SIZE resulting in SIZE_MAX being used.
MFC r263131,r263174,r263175:

  Tmpfs readdir() redundant logic and code readability cleanup.

  r263131:
    Cleanup redundant logic and add some comments to help explain how it works
    in lieu of potentially less clear code.

  r263174:
    Rename cnt to maxcookies and change its use as the condition for when to
    lookup cookies to be less obscure.

  r263175:
    Add missing FALLTHROUGH comment in tmpfs_dir_getdents for looking up '.'
    and '..'.