Sets whether the socket connection should be blocking or
not. A read call to a non-blocking socket will return immediately
if there is no data available, whereas it will block until there
is data for blocking sockets.
Paramètres
boolean $mode - TRUE for blocking sockets,
FALSE for non blocking
Valeur retournée
boolean - Retourne TRUE en cas de succès,
un objet PEAR_Error en cas d'échec.
