fix: certs field is OPTIONAL.

it manually. Make OCSP_CERTID_dup() a real function instead of a macro.

the result into interative utilities.

makes certificates genereated by ca, CA.pl etc useless for anything else.

the extension documentation.

recent mingw modifications.

such as MSYS with "native" Win32 perl.

for low-level SHA block routines.

redundant as result.