Fix lua_api.html links

en/chapters/inventories.md

@@ -102,7 +102,7 @@ minetest.create_detached_inventory("inventory_name", callbacks)
 {% endhighlight %}
 
 This creates a detached inventory or, if the inventory already exists, it is cleared.
-You can also supply a [table of callbacks](../lua_api.html#detached-inventory-callbacks).
+You can also supply a [table of callbacks]({{ page.root }}lua_api.html#detached-inventory-callbacks).
 
 ## InvRef and Lists
 

en/chapters/itemstacks.md

@@ -134,5 +134,5 @@ items:set_metadata(meta)
 ## More Methods
 
 Have a look at the
-[list of methods for an ItemStack](http://rubenwardy.com/minetest_modding_book/lua_api.html#methods_5).
+[list of methods for an ItemStack]({{ page.root }}lua_api.html#methods_5).
 There are a lot more available than talked about here.

en/chapters/player_physics.md

@@ -36,7 +36,7 @@ minetest.register_chatcommand("antigravity", {
 ## Available Overrides
 
 player:set_physics_override() is given a table of overrides.\\
-According to [lua_api.txt](../lua_api.html#player-only-no-op-for-other-objects),
+According to [lua_api.txt]({{ page.root }}lua_api.html#player-only-no-op-for-other-objects),
 these can be:
 
 * speed: multiplier to default walking speed value (default: 1)

en/chapters/readmore.md

@@ -10,7 +10,7 @@ After you've read this book, take a look at the following
 
 ### Minetest Modding
 
-* Minetest's Lua API Reference - [HTML version](../lua_api.html) |
+* Minetest's Lua API Reference - [HTML version]({{ page.root }}lua_api.html) |
   [Text version](https://github.com/minetest/minetest/blob/master/doc/lua_api.txt).
 * Explore the [Developer Wiki](http://dev.minetest.net/Main_Page).
 * Look at [existing mods](https://forum.minetest.net/viewforum.php?f=11).