lua: fix available module lists in README files

(cherry picked from commit a71e35fa)
Signed-off-by: Pierre Ynard <linkfanel@yahoo.fr>

share/lua/meta/art/README.txt

@@ -9,4 +9,4 @@ VLC Lua meta modules should define one of the following functions:
  * fetch_art(): returns a path to an artwork for the given item
 
 Available VLC specific Lua modules: msg, stream, strings, variables, item,
-objects and misc. See lua/README.txt
+objects and xml. See lua/README.txt

share/lua/meta/fetcher/README.txt

@@ -9,4 +9,4 @@ VLC Lua "meta fetcher" modules should define one of the following functions:
  * fetch_meta(): returns a path to an artwork for the given item
 
 Available VLC specific Lua modules: msg, stream, strings, variables, item,
-objects and misc. See lua/README.txt
+objects and xml. See lua/README.txt

share/lua/meta/reader/README.txt

@@ -9,6 +9,6 @@ VLC Lua "meta reader" modules should define one of the following functions:
  * read_meta(): returns a path to an artwork for the given item
 
 Available VLC specific Lua modules: msg, stream, strings, variables, item,
-objects and misc. See lua/README.txt
+objects and xml. See lua/README.txt
 
 Note, those scripts are supposed to be fast. Read non blocking, no IO.

share/lua/playlist/README.txt

@@ -21,4 +21,5 @@ VLC defines a global vlc object with the following members:
  * vlc.readline(): return a new line of playlist data on each call.
                    THIS FUNCTION CANNOT BE USED IN probe().
 
-Available VLC specific Lua modules: msg and strings. See lua/README.txt.
+Available VLC specific Lua modules: msg, strings, stream, variables and
+xml. See lua/README.txt.

share/lua/sd/README.txt

@@ -15,5 +15,5 @@ User defined modules stored in the share/lua/modules/ directory are
 available. For example, to use the sandbox module, just use
 'require "sandbox"' in your interface.
 
-Available VLC specific Lua modules: input, msg, misc, net, object, sd,
+Available VLC specific Lua modules: input, msg, net, object, sd,
 strings, variables, stream, gettext, xml. See lua/README.txt.