Drop redundant and outdated __CYGWIN32__ tests.

Change OPENSSL_SYSNAME_CYGWIN32 to OPENSSL_SYSNAME_CYGWIN.
Drop outdated Cygwin targets.

RT#3605
Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 732c5a6b)

Resolved conflicts:

	Configure
	TABLE