For interoprability reason.
To enforce it, set "#define OPENSSL_NO_STDIO 1"
All file access is done by reading/writing from/to BioByteArray()
which is filled by QFile:readAll()
Drop CRYPTO_malloc_debug / CRYPTO_mem_leaks
which is unused and disabled since many years.
If we have a QByteArray (ba) and must provide it to
a BIO* expecting OpenSSL function, the following
construct provides it: BioByteArray(ba).ro()
directly providing the QByteArray buffer as BIO
It also supports mixed writes:
BIO_write(bba, buf, size)
bba += QByteArray
New classes:
- database_model: Manage the database tables (keys, req, cert, crl, templ)
extracted from widgets/MW_database.cpp
- arguments: parse commandline, dynamically create help text
