This is only useful when building shared libraries.  This allows us to
run our tests against newer libraries when the time comes.  Simply do
this:

    OPENSSL_REGRESSION=/other/OpenSSL/build/tree make test

($OPENSSL_REGRESSION *must* be an absolute path)
Reviewed-by: NAndy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5619)

Looking for something starting with '-Wl,-rpath,' isn't good enough,
as someone might give something like '-Wl,--enable-new-dtags,-rpath,/PATH'.
Looking for ',-rpath,' should be safe enough.

We could remove the preloading stuff entirely, but just in case the
user has chosen to given RPATH setting arguments at configuration,
we'd better make sure testing will still work.  Fair warning, there
are some configuration options that do not work with preloaded OpenSSL
libraries, such as the sanity checking ones.
Reviewed-by: NRich Salz <rsalz@openssl.org>

The background story is that util/shlib_wrap.sh was setting LD_PRELOAD
or similar platform dependent variables, just in case the shared
libraries were built with -rpath.  Unfortunately, this doesn't work
too well with asan, msan or ubsan.

So, the solution is to forbid the combination of shared libraries,
-rpath and any of the sanity analyzers we can configure.

This changes util/shlib_wrap.sh so it only contains the code that sets
LD_PRELOAD when -rpath has been used when configuring.
Reviewed-by: NRich Salz <rsalz@openssl.org>

If there is cause to think LD_LIBRARY_PATH_32 and LD_PRELOAD_32 are
appropriate variables to touch, do so.  Otherwise, touch the usual
LD_LIBRARY_PATH and LD_PRELOAD.  This covers for older installations
that don't have a mix of 32-bit and 64-bit libs.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

Submitted by Erik Forsberg <erik@efca.com>
Reviewed-by: NAndy Polyakov <appro@openssl.org>

(part by Alessandro Ghedini)
Reviewed-by: NRichard Levitte <levitte@openssl.org>

PR: 3165

Submitted by: Roumen Petrov <openssl@roumenpetrov.info>
Approved by: steve@openssl.org

Another mingw fix.

Submitted by: Sean Boudreau <seanb@qnx.com>
Approved by: steve@openssl.org

qnx6 support.

and SafeDllSearchMode in Windows.

Submitted by: Richard Levitte