[PATCH] Fix a typo in chapter 6

[wuzhouhui]

* en/book/ch06-server-configuration.xml
  The mod_dav_svn is installed by Subversion, instead of Apache.

Index: book/ch06-server-configuration.xml
===================================================================
--- book/ch06-server-configuration.xml  (revision 6018)
+++ book/ch06-server-configuration.xml  (working copy)
@@ -2076,7 +2076,7 @@
         to load the <command>mod_dav_svn</command> module using the
         <literal>LoadModule</literal> directive.  This directive must
         precede any other Subversion-related configuration items.  If
-        your Apache was installed using the default layout, your
+        your Subversion was installed using the default layout, your
         <command>mod_dav_svn</command> module should have been
         installed in the <filename>modules</filename> subdirectory of
         the Apache install location (often