This change retains "or later" state! No licensing _changes_ here,
only form is adjusted (article, space between "GPL" and "v2" and so on).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

The source command does not search $PWD, and bash recently fixed itself to
follow this behavior for /bin/sh.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

function                                             old     new   delta
packed_usage                                       24136   24132      -4
uniq_main                                            399     384     -15

$COMMAND environment variable, instead put full command line (including
command to run) in second argument.  Modify $PATH to have test versions of
commands at start of path.  (Also more infrastructure for testing as root,
work in progress...)

  COMMAND=sort ./sort.tests
So we can compare against non-busybox versions, and possibly our testsuite
will be useful to somebody like the Linux Test Project someday.

Redid testing.sh to add new command, "optional", to skip tests that require
certain features.  (use: `optional FEATURE_SORT_BIG`, or `optional ""` to
stop skipping.)  Note that optional is a NOP if the environment variable
"OPTIONFLAGS" is blank, so although we're marking up the tests with busybox
specific knowledge, it doesn't interfere with running the tests without
busybox.

Moved setting the "OPTIONFLAGS" environment variable to runtest.  Philosophy:
busybox-specific stuff belongs in runtest; both testing.sh and the tests
themselves should be as busybox-agnostic as possible.

Moved detecting that a command isn't in busybox at all (hence skipping the
entire command.tests file) to runtests.  Rationale: optional can't currently
test for more than one feature at a time, so if we clear anything with
optional "" we might perform tests we don't want to.

Marked up busybox.tests to know which tests need CAT enabled.  Fixed up other
tests to be happy with new notation.

I suspect egrep should be appended to grep.  It's a sub-feature, really...

  This is used to see if given tests should be run (are available) or not.
  Print "UNTESTED: descr" if the applet or feature is not available.
- add _BB_CONFIG_DEP to existing new.tests
- move old grep test to new test infrastructure and add a few more test for
  grep.

I think this covers it.  We fail two corner cases, both of which are explicit
violations of the spec, and both of which gnu passes.

This fixes the warning, and makes the binary smaller out of sheer pique.
(Yes, since Manuel did this one it's nice tight code that took several
attempts to shrink, but I was ticked.)

Add the start of a test for uniq; this is about the first 1/3 of the
tests we need for full susv3 coverage of uniq.