Update mcl_signs's mod.conf and fluff

mods/ITEMS/mcl_signs/LICENSE

@@ -0,0 +1,16 @@
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

mods/ITEMS/mcl_signs/README.md

@@ -1,6 +1,6 @@
 # `mcl_signs`
 
-* Originally based on reworked signs mod by PilzAdam (https://forum.minetest.net/viewtopic.php?t=3289)
+* Originally based on reworked signs mod by PilzAdam (<https://forum.minetest.net/viewtopic.php?t=3289>)
 * Adapted for MineClone2 by Wuzzy
 * Later massively extended by Michial
 * Mostly rewritten and simplified by cora

mods/ITEMS/mcl_signs/mod.conf

@@ -1,3 +1,4 @@
 name = mcl_signs
 authors = cora, rudzik8
 depends = mcl_util, mcl_sounds
+optional_depens = mcl_mobitems, mcl_dye