Mention the lua intf move in NEWS. Print an error if lua wasn't found and...

Mention the lua intf move in NEWS. Print an error if lua wasn't found and wasn't explicitly disabled in configure.

NEWS

@@ -63,6 +63,11 @@ Service discovery:
 Stream output:
  * New smem module, streaming to memory
 
+Interfaces:
+ * Renamed the legacy rc, telnet and http interfaces to oldrc, oldtelnet
+   and oldhttp.
+ * rc, telnet and http are now implemented using the lua interface system.
+
 Mac OS X Interface:
  * Completely reworked user interface (based upon works from GSoC 2008)
 

configure.ac

@@ -1794,6 +1794,8 @@ then
   if test "x${have_lua}" = "xyes" ;  then
      VLC_ADD_LIBS([lua],[$LUA_LIBS])
      VLC_ADD_CFLAGS([lua],[$LUA_CFLAGS])
+  else
+      AC_MSG_ERROR([Could not find lua. Lua is needed for some interfaces (rc, telnet, http) as well as many other custom scripts. Use --disable-lua to ignore this error.])
   fi
 fi
 AM_CONDITIONAL(BUILD_LUA, [test "${have_lua}" = "yes"])