Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3661)

Suppose OPENSSL_USE_NODELETE (via Nick Reilly)
Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3399)

Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3399)

Reviewed-by: NMatt Caswell <matt@openssl.org>

test/shlibloadtest.c assumes all Unix style platforms use .so as
shared library extension.  This is not the case for Mac OS X, which
uses .dylib.  Instead of this, have the test recipe find out the
extension from configuration data.
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1844)

- Make sure to initialise SHLIB variables
- Make sure to make local variables static
Reviewed-by: NMatt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1838)

This should demonstrate that the atexit() handling is working properly (or
at least not crashing) on process exit.
Reviewed-by: NTim Hudson <tjh@openssl.org>