Only use the new informational verify codes if we
specifically ask for them.

Fix typo in docs.

use an optimization higher than -O.

anything that just links with libeay32.lib or libssl32.lib will get an
error saying the __imp__RegQueryValueEx is unresolved.

The right thing would really be to fix crypto/rand/rand_win.c to load
ADVAPI32.DLL dynamically, but that won't be done just before a
release.

work better in Win32.  Verified by zhu qun-ying <qyzhu@krdl.org.sg>.