awe_webview_set_header_definition

Defines a new Header Definition or updates it if it already exists.

@param name The unique name of the Header Definition; this is used to refer to it later in awe_webview_add_header_rewrite_rule and related methods.

@param num_fields The number of fields in the header.

@param field_names An array of strings representing the field names

@param field_vales An array of strings representing the field values