This class is used to upload a compressed file using HTTP POST request. As this
class derives from wxDebugReportCompress, before upload the report is
compressed in a single .ZIP file.
This class will upload the compressed file created by its base class to an HTML
multipart/form-data form at the specified address. The url is the upload
page address, input is the name of the "type=file" control on
the form used for the file name and action is the value of the form
action field. The report is uploaded using curl program which
should be available, the curl parameter may be used to specify the full
path to it.
This function may be overridden in a derived class to show the output from
curl: this may be an HTML page or anything else that the server returned.
Value returned by this function becomes the return value of