SALZBURG, Austria — In this alpine border town, the suspension of train service into neighboring Germany has been a boon to taxi drivers. Taha, who asked to use only his first name lest local tax collectors hound him about his earnings, makes 300 euros every time he drives a stranded traveler the 143 kilometers (about 90 miles) to Munich. Since Germany stopped rail service from Austria in mid-September as a way to slow the tide of refugees pouring northward, Taha has made 18 such trips. “Normally in a month I would go to Munich one time,” he said last week...