lua: document the use of -I luaintf instead of -I lua

(cherry picked from commit 70f556e4)
Signed-off-by: Pierre Ynard <linkfanel@yahoo.fr>

share/lua/intf/cli.lua

@@ -39,7 +39,7 @@ description=
     vlc -I cli --lua-config "cli={hosts={'*console','localhost:4212','telnet://localhost:5678'}}"
 
  Note:
-    -I cli and -I luacli are aliases for -I lua --lua-intf cli
+    -I cli and -I luacli are aliases for -I luaintf --lua-intf cli
 
  Configuration options setable throught the --lua-config option are:
     * hosts: A list of hosts to listen on.

share/lua/intf/dummy.lua

@@ -4,8 +4,8 @@ msg = [[
 This is the `dummy' VLC Lua interface module.
 Please specify a VLC Lua interface to load with the --lua-intf option.
 VLC Lua interface modules include: `rc', `telnet' and `http'.
-For example: vlc -I lua --lua-intf rc
-You can also use the alternate syntax: vlc -I "lua{intf=rc}"
+For example: vlc -I luaintf --lua-intf rc
+You can also use the alternate syntax: vlc -I "luaintf{intf=rc}"
 See share/lua/intf/README.txt for more information about lua interface modules.]]
 
 for line in string.gmatch(msg,"([^\n]+)\n*") do

share/lua/intf/dumpmeta.lua

@@ -22,7 +22,7 @@ dumpmeta.lua: dump a file's meta data on stdout/stderr
 --]==========================================================================]
 
 --[[ to dump meta data information in the debug output, run:
-       vlc -I lua --lua-intf dumpmeta coolmusic.mp3
+       vlc -I luaintf --lua-intf dumpmeta coolmusic.mp3
      Additional options can improve performance and output readability:
        -V dummy -A dummy --no-video-title --no-media-library --verbose-objects +lua,-all -v=0
 --]]

share/lua/intf/luac.lua

@@ -24,7 +24,7 @@
 usage = 
 [[
 To compile a lua script to bytecode (luac) run:
-  vlc -I lua --lua-intf --lua-config 'luac={input="file.lua",output="file.luac"}'
+  vlc -I luaintf --lua-intf --lua-config 'luac={input="file.lua",output="file.luac"}'
 Output will be similar to that of the luac command line tool provided with lua with the following arguments:
   luac -o file.luac file.lua
 ]]