added a link to the enterCredential page from the help page.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@3415 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/scm/SubversionSCM/DescriptorImpl/url-help.jelly

@@ -0,0 +1,9 @@
+<div>
+  Specify the subversion repository URL to check out, such as "http://svn.apache.org/repos/asf/ant/".
+  <br/>
+  When you enter URL, Hudson automatically checks if Hudson can connect to it. If access requires
+  authentication, it will ask you the necessary credential. If you already have a working
+  credential but would like to change it for other reasons,
+  click <a href="${rootURL}/scm/SubversionSCM/enterCredential">this link</a>
+  and specify different credential.
+</div>

core/src/main/resources/hudson/scm/SubversionSCM/config.jelly

@@ -2,7 +2,7 @@
   <f:entry title="Modules">
     <f:repeatable var="loc" items="${scm.locations}" noAddButton="true" minimum="1">
       <table width="100%">
-        <f:entry title="Repository URL" help="/help/subversion/url.html">
+        <f:entry title="Repository URL" help="${rootURL}/scm/SubversionSCM/url-help">
           <f:textbox name="svn.location_remote" value="${loc.remote}"
             checkUrl="'${rootURL}/scm/SubversionSCM/svnRemoteLocationCheck?value='+encode(this.value)"/>
         </f:entry>

war/resources/help/subversion/url.html

@@ -1,4 +0,0 @@
-<div>
-  Specify the subversion repository URL to check out,
-  such as "http://svn.apache.org/repos/asf/ant/".
-</div>