Specifies the HTTP User-Agent string to use. If null, empty or malformed, the following string will be used: 'Tinman3D/X.Y', where X and Y are the major resp. minor version numbers of TinmanCoreModule (see TinmanModule.Info).
If possible, the SimpleHttp class will use the default HTTP stack of the enclosing system, for example the Windows HTTP Services (WinHTTP) for C++ and System.Net.Http.HttpClient for C#. If there is no such default HTTP stack, the cURL library (https://curl.se) will be used, assuming that is has been installed on the system. This parameter can be used to adjust this behaviour: < 0 : cURL will never be used, even if there is no default HTTP stack, = 0 : cURL will only be used if there is no default HTTP stack, > 1 : cURL will always be used, even if there is a default HTTP stack.