ARCGISONLINEFEATURES and ARCGISPORTALFEATURES to support setting a coordinate sy

Hi all, to link a KB question I had about how to do this (you cannot yet), when creating a new feature service the underlying API supports specifying a coordinate system by specifying a well known ID (e.g. EPSG number) but this is not exposed in the writer, and the default Web Mercator projection is used. Feature services are more likely to contain 'real data' captured at large scale or tied to survey control, and not features tied to a web tiling system. The portal will attempt a suitable geographic transformation but even so this can move your data. Lets support a WKID so coordinates go in accurately.