Include <openssl/opensslconf.h> - currently ssl.h is relying on it being
pulled in elsewhere, even though it is makes use of the OPENSSL_NO_*
defines. While here, remove kssl.h since it is a no-op.

ok beck@ miod@
Expand the OPENSSL_.*GLOBAL.* macros and stop including e_os2.h.

ok miod@ beck@
Move ssltest.c to a regress test.