add shortErrorString

src/main/java/org/cobbzilla/util/daemon/ZillaRuntime.java

@@ -169,10 +169,12 @@ public class ZillaRuntime {
         throw e;
     }
 
+    public static String shortErrorString(Exception e) { return e.getClass().getName()+": "+e.getMessage(); }
+
     public static String errorString(Exception e) { return errorString(e, 1000); }
 
     public static String errorString(Exception e, int maxlen) {
-        return truncate(e.getClass().getName()+": "+e.getMessage()+"\n"+ getStackTrace(e), maxlen);
+        return truncate(shortErrorString(e)+"\n"+ getStackTrace(e), maxlen);
     }
 
     public static boolean empty(String s) { return s == null || s.length() == 0; }