NEW YORK (Reuters) – A New York man who planned to join Islamic State and attacked an FBI agent may be sentenced on Tuesday to a longer prison term after a federal appeals court called his 17-year sentence “shockingly low.” Fareed Mumuni, 27, pleaded guilty in 2017 to discussing plans to travel overseas to join the militant group also known as ISIS and to trying to stab an FBI agent after authorities arrived at his Staten Island residence in 2015 to execute a search warrant. The United States brands Islamic State a foreign terrorist organization. Federal prosecutors in Brooklyn appealed Mumuni…