Add "site-lisp" to manual indices.

* custom.texi (Init File): Index site-lisp.

* doc/lispref/loading.texi (Library Search): Index site-lisp directories.

Fixes: debbugs:11435

doc/emacs/ChangeLog

+2012-07-07  Chong Yidong  <cyd@gnu.org>
+
+	* custom.texi (Init File): Index site-lisp (Bug#11435).
+
 2012-07-06  Chong Yidong  <cyd@gnu.org>
 
 	* emacs.texi: Re-order top-level menu to correspond to logical

doc/emacs/custom.texi

@@ -2103,11 +2103,12 @@ loading of this library, use the option @samp{--no-site-file}.
 better to put them in @file{default.el}, so that users can more easily
 override them.
 
+@cindex site-lisp directories
   You can place @file{default.el} and @file{site-start.el} in any of
 the directories which Emacs searches for Lisp libraries.  The variable
 @code{load-path} (@pxref{Lisp Libraries}) specifies these directories.
-Many sites put these files in the @file{site-lisp} subdirectory of the
-Emacs installation directory, typically
+Many sites put these files in a subdirectory named @file{site-lisp} in
+the Emacs installation directory, such as
 @file{/usr/local/share/emacs/site-lisp}.
 
   Byte-compiling your init file is not recommended (@pxref{Byte

doc/lispref/ChangeLog

+2012-07-07  Chong Yidong  <cyd@gnu.org>
+
+	* loading.texi (Library Search): Index site-lisp directories.
+
 2012-07-06  Chong Yidong  <cyd@gnu.org>
 
 	* intro.texi (A Sample Function Description): Fix incorrect

doc/lispref/loading.texi

@@ -262,6 +262,7 @@ Here is how to set it from @code{csh}:
 setenv EMACSLOADPATH /home/foo/.emacs.d/lisp:/opt/emacs/lisp
 @end example
 
+@cindex site-lisp directories
   If @env{EMACSLOADPATH} is not set (which is usually the case), Emacs
 initializes @code{load-path} with the following two directories: