=head1 NAME
- BIO_push, BIO_pop - add and remove BIOs from a chain.
+BIO_push, BIO_pop - add and remove BIOs from a chain.
=head1 SYNOPSIS
BIO_push(b64, f);
-is made then the new chain will be B<b64-chain>. After making the calls
+is made then the new chain will be B<b64-f>. After making the calls
BIO_push(md2, b64);
BIO_push(md1, md2);