LONDON — Iran on Monday executed a second man, 22-year-old Majid Reza Rahnavard, who had been convicted on charges of “waging war against God” amid ongoing protests in the country. Rahnavard is the second protestor executed by the Islamic Republic in less than a week on charges related to the ongoing protests that have gripped the country in recent months. On Thursday, Mohsen Shekari was executed for closing a street in Tehran and injuring a policeman with a knife.