=item B<-dtls>, B<-dtls1>, B<-dtls1_2>
These options make B<s_client> use DTLS protocols instead of TLS.
-With B<-dtls>, B<s_client> will negotiate any supported DTLS protcol version,
+With B<-dtls>, B<s_client> will negotiate any supported DTLS protocol version,
whilst B<-dtls1> and B<-dtls1_2> will only support DTLS1.0 and DTLS1.2
respectively.
The maximum number of encrypt/decrypt pipelines to be used. This will only have
an effect if an engine has been loaded that supports pipelining (e.g. the dasync
-engine) and a suiteable ciphersuite has been negotiated. The default value is 1.
+engine) and a suitable ciphersuite has been negotiated. The default value is 1.
See L<SSL_CTX_set_max_pipelines(3)> for further information.
=item B<-read_buf int>