Added (RTLD_NOW | RTLD_GLOBAL) to dlopen() test.  There is no RTLD_GLOBAL
on FreeBSD 2.2.9.

Added uint32_t test, with fallback to u_int32_t, similar to uint64_t one.
Added fallback to u_int32_t in in_addr_t test.

With these changes it is now possible to compile nginx on FreeBSD 2.2.9
with only few minor warnings (assuming -Wno-error).

Fixed a regression introduced in rev. 434548349838 that prevented
auto/types/sizeof and auto/types/typedef properly reporting autotest
source code to autoconf.err in case of test failure.

OPENSSL_config() deprecated in OpenSSL 1.1.0.  Additionally,
SSL_library_init(), SSL_load_error_strings() and OpenSSL_add_all_algorithms()
are no longer available if OPENSSL_API_COMPAT is set to 0x10100000L.

The OPENSSL_init_ssl() function is now used instead with appropriate
arguments to trigger the same behaviour.  The configure test changed to
use SSL_CTX_set_options().

Deinitialization now happens automatically in OPENSSL_cleanup() called
via atexit(3), so we no longer call EVP_cleanup() and ENGINE_cleanup()
directly.

Generate Makefile with not so long lines.

Just using "cp" is incorrect, as it will overwrite old files
possibly used by OS, leading to unexpected effects.  Changed
to "mv + cp", much like used for the main binary.

Removed extraneous braces around shell variables.