[processargs] Rename PA_SVC_LOADER to PA_LDSVC_LOADER We ended up calling the loader service LDSVC in FIDL. This change aligns the processargs name with the FIDL name. Change-Id: I5cb2332f047676c2e49fa5b20719aa841185cf19
[zx] Magenta -> Zircon The Great Renaming is here! Change-Id: I3229bdeb2a3d0e40fb4db6fec8ca7d971fbffb94
[docs] Document program loading, processargs, loader service Change-Id: I8d5a901a646aca758d0abc9a9d0f1218fe871b09