Use = rather than == for expressions to test(1) builtin(1) in sh(1) to
 comply with standards.

 On modern branches there is an undocumented alias (see r219084) but on
 stable/7 this is still an error.

 Sponsored by:	Cisco Systems, Inc.

 Add regression tests scripts for multi-IP FIBs exercising the send,
 receive and forward path tagging packets with both the ifconfig fib
 option or using ipfw, running ICMP6, TCP/v6 and UDP/v6 tests and
 testing both setfib(2) as well as the SO_SETFIB socket option.

 At 16 FIBs a total of over 64k return codes/replies/stati are checked,
 sometimes multiple times (in different ways, e.g. the reflected request
 as well as ipfw counter values).

 The scripts need two or three machines to run and are thus not added
 to the tools/regression framework but only to tools/test.

MFC r232114:

 Update scripts to work around two sh(1) bugs found in stable/8:
 1) _x=$((_x + 1)) does not work while x=$((x + 1)) does.
 2) Parameter Expansion, esp. "${x%%bar}" does not work if quoted.

 Correct typos and improve some details forwarding.sh already
 had in initiator, esp. related to ipfw accepting if the default
 is deny.

 Add an extra stat call to the "delay" function in addition to the
 touch which together is still a lot faster than sleep 1 but seems
 to help a lot more to mitigate the unrelated kernel race seen.

Sponsored by:	Cisco Systems, Inc.

Fix warnings and style(9) issues.
Set WARNS to 6.

Add a TestFloat based test suite for floating-point implementations
currently supporting sparc64. After a `make depend all` there are
three programs; testsoftfloat for testing against the SoftFloat in
src/lib/libc/softfloat for reference purposes, testemufloat for
testing the emulator source in src/lib/libc/sparc64/fpu and testfloat
for testing with the installed libc. Support for other architectures
can be added as needed.

PR:		144900
Submitted by:	Peter Jeremy

It invokes multiple parallel threads and each thread calls vfork()
system call.

Approved by: kib

OK'ed by:	core

any fake value.

is very useful for collecting test-data for trial runs.