updated several mods:

blox, bobblocks, castle, digilines, home decor, mesecons, pipeworks, and
quartz

quartz/README.txt

@@ -15,7 +15,7 @@ stairs (found in minetest_game)
 moreblocks (optional, for stairsplus support)
 
 Please report bugs at the github issue tracker:
-https://github.com/4Evergreen4/quartz/issues/
+https://github.com/minetest-mods/quartz/issues/
 
 Crafting:
 

quartz/init.lua

@@ -153,7 +153,7 @@ minetest.register_abm({
 -- Compatibility with stairsplus
 --
 
-if minetest.get_modpath("moreblocks") and enable_stairsplus then
+if minetest.get_modpath("moreblocks") and ENABLE_STAIRSPLUS then
 	register_stair_slab_panel_micro("quartz", "block", "quartz:block",
 		{cracky=3},
 		{"quartz_block.png"},
@@ -187,7 +187,7 @@ end
 -- Deprecated
 --
 
-if enable_horizontal_pillar then
+if ENABLE_HORIZONTAL_PILLAR then
 	-- Quartz Pillar (horizontal)
 	minetest.register_node("quartz:pillar_horizontal", {
 			description = "Quartz Pillar Horizontal",

quartz/mod.conf

@@ -0,0 +1 @@
+name = quartz

quartz/settings.txt

@@ -1,7 +1,7 @@
 -- Set this to true to allow usage of the stairsplus mod in moreblocks
 
-enable_stairsplus = false
+ENABLE_STAIRSPLUS = false
 
 -- This enables the old horizontal pillar block(deprecated, be sure to convert them back to normal pillars)
 
-enable_horizontal_pillar = true
+ENABLE_HORIZONTAL_PILLAR = true