Xcos help: typo

See Sundials CVode doc to make sure this is a typo

Change-Id: Icd470def11b3a7fe638921120ef0b9d3e50a4060
Detail the protocols supported by the function getURL & getURLcontent in the official Scilab binary

Change-Id: I2d99b082eeadfd8a6e841fa861b70cf9ccfd1e87