Doc: document changes to require and LoadScript

doc/PACKS.md

@@ -103,6 +103,8 @@ The following interfaces are provided:
 
 * `bool :LoadScript(luafilename)`: load and execute a lua script
   * `require` can be used instead (since PopTracker 0.21.0)
+  * `require` behaves mostly like Lua require since 0.25.6
+  * `...` contains mod name for relative require since 0.25.6
 * `bool :AddMemoryWatch(name,addr,len,callback,interal)`: add a memory watch for auto-tracking, see [AUTOTRACKING.md](AUTOTRACKING.md)
 * `bool :RemoveMemoryWatch(name)`: remove memory watch by name, available since 0.11.0
 * `bool :AddWatchForCode(name,code,callback)`: callback(code) will be called whenever an item changed state that canProvide(code). Only available in PopTracker, since 0.11.0, will return a reference (name) to the watch since 0.18.2. Use "*" to trigger for all codes since 0.25.5.