supported whitespace in CVS modules by using the escape syntax "\ " (#663)

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@3859 71c3de6d-444a-0410-be80-ed276b4c234a

war/resources/help/_cvs/modules.html

 <div>
   The CVS module name(s) in the given <tt>CVSROOT</tt> to check out.
   Multiple modules can be specified by separating them by a whitespace.
+
+  If your module name contains whitespace, you can escape by writing it as '\ '.
+  For example "foo\ bar zot" will specify two modules "foo bar" and "zot".
 </div>
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