15.3
Update Cryptlib
Revert lots of Cryptlib updates.
More va_* work
Fix stdarg to work the same everywhere.
Cryptlib: replace CryptPem with CryptPemNull
Make openssl accept the right set of KU/EKUs
Consolidate most of our standard lib functions to lib
Add crypto libraries
Restructure our includes.
make: use -Wextra (minus some obnoxious bits)
Cryptlib: remove DES
Use portable shebangs: /bin/bash -> /usr/bin/env bash