Improvements to Net::SSLeay::read to make it easier to use with non-blocking IO:
contributed by James Marshall: It modifies
Net::SSLeay::read() to return the result from SSL_read() as the second
return value, if Net::SSLeay::read() is called in list context. Its
behavior should be unchanged if called in scalar or void context. This
result code seems to be required for full support of non-blocking I/O,
since users need to handle SSL_ERR_WANT_READ, SSL_ERROR_WANT_WRITE, etc.