summary edit: mention that some options take a curl_off_t

curl_easy_setopt() is used to tell libcurl how to behave. By using the

appropriate options to \fIcurl_easy_setopt\fP, you can change libcurl's

behavior.  All options are set with the \fIoption\fP followed by a

\fIparameter\fP. That parameter can be a long, a function pointer or an object

pointer, all depending on what the specific option expects. Read this manual

carefully as bad input values may cause libcurl to behave badly!  You can only

set one option in each function call. A typical application uses many

curl_easy_setopt() calls in the setup phase.

\fIparameter\fP. That parameter can be a \fBlong\fP, a \fBfunction pointer\fP,

an \fBobject pointer\fP or a \fBcurl_off_t\fP, depending on what the specific

option expects. Read this manual carefully as bad input values may cause

libcurl to behave badly!  You can only set one option in each function call. A

typical application uses many curl_easy_setopt() calls in the setup phase.

Options set with this function call are valid for all forthcoming transfers

performed using this \fIhandle\fP.  The options are not in any way reset

want the transfer to start from. Set this option to 0 to make the transfer

start from the beginning (effectively disabling resume).

.IP CURLOPT_RESUME_FROM_LARGE

Pass an curl_off_t as parameter. It contains the offset in number of bytes

that you want the transfer to start from. (Added in 7.11.0)

Pass a curl_off_t as parameter. It contains the offset in number of bytes that

you want the transfer to start from. (Added in 7.11.0)

.IP CURLOPT_CUSTOMREQUEST

Pass a pointer to a zero terminated string as parameter. It will be user

instead of GET or HEAD when doing an HTTP request, or instead of LIST or NLST