function names recently changed - consistency.

     unsigned to signed types: this was killing the Win32 compile.

     [Steve Henson]

  *) Add new certificate file to stack functions, SSL_add_cert_file_to_stack()

     and SSL_add_cert_dir_to_stack(). These largely supplant

     SSL_load_client_CA_file(), and can be used to add multiple certs easily to

     a stack (usually this is then handed to SSL_CTX_set_client_CA_list()).

  *) Add new certificate file to stack functions,

     SSL_add_dir_cert_subjects_to_stack() and

     SSL_add_file_cert_subjects_to_stack().  These largely supplant

     SSL_load_client_CA_file(), and can be used to add multiple certs easily

     to a stack (usually this is then handed to SSL_CTX_set_client_CA_list()).

     This means that Apache-SSL and similar packages don't have to mess around

     to add as many CAs as they want to the preferred list.

     [Ben Laurie]

 * \param stack the stack to append to.

 * \param dir the directory to append from. All files in this directory will be

 * examined as potential certs. Any that are acceptable to

 * SSL_add_cert_file_to_stack() that are not already in the stack will be

 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be

 * included.

 * \return 1 for success, 0 for failure. Note that in the case of failure some

 * certs may have been added to \c stack.