added blurb to explain why it's worth installing

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@12379 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/lifecycle/WindowsInstallerLink/index.jelly

@@ -9,6 +9,8 @@
             ${%Install as Windows Service}
           </h1>
 
+          <p>${%installBlurb}</p>
+
           <form action="doInstall" method="post">
             <table>
               <f:entry title="${%Installation Directory}">

core/src/main/resources/hudson/lifecycle/WindowsInstallerLink/index.properties

-restartBlurb=Installation is successfully completed. Do you want to stop this Hudson and start a newly installed Windows service? 
\ No newline at end of file
+installBlurb=Installing Hudson as a Windows service allows you to start Hudson as soon as the machine starts, and regardless of \
+  who is interactively using Hudson.
+restartBlurb=Installation is successfully completed. Do you want to stop this Hudson and start a newly installed Windows service?
\ No newline at end of file