Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Make these all work with the new way of doing privatelib.

Without these CFLAGS settings a cross-compile won't find the headers
anywhere.

Tested:

* mips (32, big endian) cross-build w/ LOCAL_DIRS including these
tools.

Convert to LIBADD

Update these to make them actually compile!

Tested:

* cross compilation to MIPS

NO_MAN= has been deprecated in favor of MAN= for some time, go ahead
and finish the job. ncurses is now the only Makefile in the tree that
uses it since it wasn't a simple mechanical change, and will be
addressed in a future commit.

Modify wlanstats to now use the copy of libbsdstat in /usr/lib/private.

To avoid having to explicitly test COMPILER_TYPE for setting
clang-specific or gcc-specific flags, introduce the following new
variables for use in Makefiles:

CFLAGS.clang
CFLAGS.gcc
CXXFLAGS.clang
CXXFLAGS.gcc

In bsd.sys.mk, these get appended to the regular CFLAGS or CXXFLAGS for
the right compiler.

MFC after: 1 week

We are exceeding default limit (256) of bracket nesting and clang does not like
it. We should probably fix the code but appeasing clang with this fix for now.
gcc does not have such limit.

Reviewed by: jmg
Approved by: re (hrs), sbruno (mentor, implicit)

checkpoint new version

Style: NO_MAN doesn't need any value.

o move programs to separate directories and use stock Makefiles;
this simplifies including them in crunchgen images
o rename 80211* programs to wlan* as was originally intended