Style fix: leave brackets around for() one-liners

apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnel.java

...ing/java/src/net/i2p/client/streaming/MessageHandler.java

apps/susimail/src/src/i2p/susi/webmail/WebMail.java

core/java/src/net/i2p/crypto/TransientSessionKeyManager.java

core/java/src/net/i2p/stat/StatManager.java

router/java/src/net/i2p/router/client/ClientManager.java

...ava/src/net/i2p/router/networkdb/kademlia/StoreState.java