MADRID (Reuters) -The Spanish government will approve mortgage relief measures, such as extending loan repayments for up to seven years, for more than one million vulnerable households and middle-class clients on Tuesday, the economy ministry said on Monday. The ministry said the new measures would be adopted pending final negotiations with Spanish banking associations. In Spain, around three-quarters of the population are homeowners, with most opting for floating-rate mortgages, which are more exposed to accelerated interest rate rises. Under the framework, banks will provide mortgage support…