scm automatic cleanups.
IPRT,SUP: First part of timestamp counter signatures support.
RTCrX509: Another name component mapping.
Added the odd sha-2 algorithms to RTCrDigest and extended the testcases to cover them. Added VBOX_WITH_ALT_HASH_CODE for avoiding the OpenSSL code even for VBoxRT.dll/so/dylib.
Merged in iprt++ dev branch.