Remove BIO_f_reliable(), guilty of playing with EVP_MD_CTX internals it
should not know anything about. Verified not to be used in ports; riding upon
the recent libcrypto major bump.
Remove ancient workaround for previous century's compilers in the declaration
of CRYPTO_EX_DATA; riding upon the libcrypto major bump.
Remove previously commented out wrong code, as well as the comment saying this
is incorrect code.
Unifdef -UNO_SYS_TYPES_H