Document two launch options.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@464498 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/running.html

@@ -127,12 +127,23 @@ Options:
                          1 (lowest) to 10 (highest); 5 is the default
   -nouserlib             Run ant without using the jar files from ${user.home}/.ant/lib
   -noclasspath           Run ant without using CLASSPATH
+  -noproxy               Java 1.5 only: do not use the OS proxies
+  -main <class>          override Ant's normal entry point  
 </pre>
 <p>For more information about <code>-logger</code> and
 <code>-listener</code> see
 <a href="listeners.html">Loggers &amp; Listeners</a>.
 <p>For more information about <code>-inputhandler</code> see
 <a href="inputhandler.html">InputHandler</a>.
+<p>Easiest way of changing the exit-behaviour is subclassing the original main class:
+<pre>
+public class CustomExitCode extends org.apache.tools.ant.Main {
+    protected void exit(int exitCode) {
+        // implement your own behaviour, e.g. NOT exiting the JVM
+    }
+}
+</pre> and starting Ant with access (<tt>-lib path-to-class</tt>) to this class.
+</p>
 
 <h3><a name="libs">Library Directories</a></h3>
 <p>
@@ -161,7 +172,7 @@ added to the classpath is as follows:
 
 <p>
 Note that the CLASSPATH environment variable is passed to Ant using a -lib
-option. Ant itself is started with a very minimalistic classpath. 
+option. Ant itself is started with a very minimalistic classpath.
 Ant should work perfectly well with an empty CLASSPATH environment variable,
 something the the -noclasspath option actually enforces. We get many more support calls related to classpath problems (especially quoting problems) than
 we like.
@@ -244,7 +255,7 @@ available via Project instance, I searched for them with a
     grep -r -n "getPropert" * &gt; ..\grep.txt
 </pre>
 command. After that I filtered out the often-used but not-so-important values (most of them
-read-only values): <i>path.separator, ant.home, basedir, user.dir, os.name, 
+read-only values): <i>path.separator, ant.home, basedir, user.dir, os.name,
 line.separator, java.home, java.version, java.version, user.home, java.class.path</i><br>
 And I filtered out the <i>getPropertyHelper</i> access.</p>
 <table border="1">
@@ -284,9 +295,9 @@ org.apache.tools.ant.Executor implementation specified here.
   <td><code>ant.file.*</code></td>
   <td>read only: full filename of the build file of Ant projects
   </td>
-  <td>This is set to the name of a file by project;  
+  <td>This is set to the name of a file by project;
   this lets you determine the location of <a href="CoreTasks/import.html">
-  &lt;import&gt;-ed</a> files,  
+  &lt;import&gt;-ed</a> files,
   </td>
 </tr>
 
@@ -455,8 +466,8 @@ org.apache.tools.ant.Executor implementation specified here.
 
 <p>
 If new properties get added (it happens), expect them to appear under the
-"ant." and "org.apache.tools.ant" prefixes, unless the developers have a 
-very good reason to use another prefix. Accordingly, please avoid using 
+"ant." and "org.apache.tools.ant" prefixes, unless the developers have a
+very good reason to use another prefix. Accordingly, please avoid using
 properties that begin with these prefixes. This protects you from future
 Ant releases breaking your build file.
 </p>
@@ -538,7 +549,7 @@ include:
 </ul>
 
 <p>
-The latter method supports the -lib, -nouserlib, -noclasspath options and will 
+The latter method supports the -lib, -nouserlib, -noclasspath options and will
     load jars from the specified ANT_HOME. You should start the latter with the most minimal
 classpath possible, generally just the ant-launcher.jar.
 </p>
@@ -572,4 +583,4 @@ Here is an example:
 
 
 </body>
-</html>
+</html>