minor edit

docs/curl.1

@@ -68,7 +68,7 @@ used.
 most secure one the remote site claims it supports. This is done by first
 doing a request and checking the response-headers, thus inducing an extra
 network round-trip. This is used instead of setting a specific authentication
-method, which you can do with \fI--digest\fP, \fI--ntlm\fP, and
+method, which you can do with \fI--basic\fP, \fI--digest\fP, \fI--ntlm\fP, and
 \fI--negotiate\fP. (Added in 7.10.6)
 
 If this option is used several times, the following occurrences make no