Enables a full trace dump of all incoming and outgoing data, including
descriptive information, to the given output file.
-If this option is used several times, the last one will be used.
+If this option is used several times, the last one will be used. (Added in
+curl 7.9.7)
.IP "-u/--user <user:password>"
Specify user and password to use when fetching. See README.curl for detailed
examples of how to use this. If no password is specified, curl will