Changes between 0.9.7a and 0.9.8 [xx XXX xxxx]
+ *) Various fixes to base64 BIO and non blocking I/O. On write
+ flushes were not handled properly if the BIO retried. On read
+ data was not being buffered properly and had various logic bugs.
+ [Steve Henson]
+
*) Support for single pass processing for S/MIME signing. This now
means that S/MIME signing can be done from a pipe, in addition
cleartext signing (multipart/signed type) is effectively streaming