use methods to specify which report rather than string constants

* MultiReporter
    deleted. direct method calls are a better way to specify the kind of report desired
    getReports was never used to choose from the array of strings. no use case for MultiReporter.
* ArchiveUtils
    writeReportToString was not used, and it used the now deleted MultiReporter#reportTo
* DevUtils, Frontier, ToePool, AbstractFrontier, WorkQueueFrontier
    MultiReporter -> Reporter and make methods that implemented named multireport public
* FrontierNonemptyReport, FrontierSummaryReport
    call the appropriate report method instead of passing a string constant

commons/src/main/java/org/archive/util/ArchiveUtils.java

@@ -741,22 +741,6 @@ public class ArchiveUtils {
         pw.flush();
         return sw.toString();
     }
-
-    /**
-     * Compose the requested report into a String. DANGEROUS IF REPORT
-     * CAN BE LARGE.
-     * 
-     * @param rep Reported
-     * @param name String name of report to compose
-     * @return String of report
-     */
-    public static String writeReportToString(MultiReporter rep, String name) {
-        StringWriter sw = new StringWriter();
-        PrintWriter pw = new PrintWriter(sw);
-        rep.reportTo(name,pw);
-        pw.flush();
-        return sw.toString();
-    }
     
     /**
      * Enhance given object's default String display for appearing
@@ -773,8 +757,8 @@ public class ArchiveUtils {
         } else if (obj instanceof Map) {
             return prettyString((Map) obj);
         } else {
-        return "<"+obj+">"; 
-    }
+            return "<"+obj+">"; 
+        }
     }
     
     /**

commons/src/main/java/org/archive/util/DevUtils.java

@@ -55,8 +55,8 @@ public class DevUtils {
         StringWriter sw = new StringWriter();
         PrintWriter pw = new PrintWriter(sw); 
         final Thread current = Thread.currentThread();
-        if (current instanceof MultiReporter) {
-            MultiReporter tt = (MultiReporter)current;
+        if (current instanceof Reporter) {
+            Reporter tt = (Reporter)current;
             try {
                 tt.reportTo(pw);
             } catch (IOException e) {

commons/src/main/java/org/archive/util/MultiReporter.java

@@ -1,47 +0,0 @@
-/*
- *  This file is part of the Heritrix web crawler (crawler.archive.org).
- *
- *  Licensed to the Internet Archive (IA) by one or more individual 
- *  contributors. 
- *
- *  The IA licenses this file to You under the Apache License, Version 2.0
- *  (the "License"); you may not use this file except in compliance with
- *  the License.  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-package org.archive.util;
-
-import java.io.PrintWriter;
-
-/**
- * @contributor stack
- */
-@Deprecated
-public interface MultiReporter  extends Reporter {
-    /**
-     * Get an array of report names offered by this Reporter. 
-     * A name in brackets indicates a free-form String, 
-     * in accordance with the informal description inside
-     * the brackets, may yield a useful report.
-     * 
-     * @return String array of report names, empty if there is only
-     * one report type
-     */
-    public String[] getReports();
-    
-    /**
-     * Make a report of the given name to the passed-in Writer,
-     * If null, give the default report. 
-     * 
-     * @param writer to receive report
-     */
-    public void reportTo(String name, PrintWriter writer);
-}