=head1 NAME
+BIO_TYPE_NONE, BIO_TYPE_MEM, BIO_TYPE_FILE, BIO_TYPE_FD, BIO_TYPE_SOCKET,
+BIO_TYPE_NULL, BIO_TYPE_SSL, BIO_TYPE_MD, BIO_TYPE_BUFFER, BIO_TYPE_CIPHER,
+BIO_TYPE_BASE64, BIO_TYPE_CONNECT, BIO_TYPE_ACCEPT, BIO_TYPE_PROXY_CLIENT,
+BIO_TYPE_PROXY_SERVER, BIO_TYPE_NBIO_TEST, BIO_TYPE_NULL_FILTER,
+BIO_TYPE_BER, BIO_TYPE_BIO, BIO_TYPE_DESCRIPTOR, BIO_TYPE_FILTER,
+BIO_TYPE_SOURCE_SINK,
BIO_find_type, BIO_next, BIO_method_type - BIO chain traversal
=head1 SYNOPSIS