---
Set TLS authentication type. Currently, the only supported option is "SRP",
for TLS-SRP (RFC 5054). If --tlsuser and --tlspassword are specified but
---tlsauthtype is not, then this option defaults to "SRP".
+--tlsauthtype is not, then this option defaults to "SRP". This option works
+only if the underlying libcurl is built with TLS-SRP support, which requires
+OpenSSL or GnuTLS with TLS-SRP support.