* Move almost all uses of StringBuffer to StringBuilder,

for efficiency (thanks Arsene for the suggestion)

router/java/src/net/i2p/data/i2np/DatabaseLookupMessage.java

@@ -238,7 +238,7 @@ public class DatabaseLookupMessage extends I2NPMessageImpl {
     
     @Override
     public String toString() {
-        StringBuffer buf = new StringBuffer();
+        StringBuilder buf = new StringBuilder();
         buf.append("[DatabaseLookupMessage: ");
         buf.append("\n\tSearch Key: ").append(getSearchKey());
         buf.append("\n\tFrom: ").append(getFrom());