@set
Description:
Set the value of the specified header.
If value is null and the header, name, had not been previously set, a space will
be set aside for it (useful for setting the order of headers before values can be obtained for them) otherwise the header will be unset.
Note: If there are multiple headers with the specified field name, the first instance of the header will be replaced and further instances will be removed.
Parameters:
| this | |
| name |
header name |
| value |
header value |
| charset |
a charset |