miniupnp: set submodule to upstream, disable install

.gitmodules

@@ -4,8 +4,7 @@
 	branch = monero
 [submodule "external/miniupnp"]
 	path = external/miniupnp
-	url = https://github.com/monero-project/miniupnp
-	branch = monero
+	url = https://github.com/miniupnp/miniupnp
 [submodule "external/rapidjson"]
 	path = external/rapidjson
 	url = https://github.com/Tencent/rapidjson

external/CMakeLists.txt

@@ -38,8 +38,10 @@
 find_package(Miniupnpc REQUIRED)
 
 message(STATUS "Using in-tree miniupnpc")
+set(UPNPC_NO_INSTALL TRUE CACHE BOOL "Disable miniupnp installation" FORCE)
 add_subdirectory(miniupnp/miniupnpc)
 set_property(TARGET libminiupnpc-static PROPERTY FOLDER "external")
+set_property(TARGET libminiupnpc-static PROPERTY POSITION_INDEPENDENT_CODE ON)
 if(MSVC)
   set_property(TARGET libminiupnpc-static APPEND_STRING PROPERTY COMPILE_FLAGS " -wd4244 -wd4267")
 elseif(NOT MSVC)

external/miniupnp

@@ -1 +1 @@
-Subproject commit 4c700e09526a7d546394e85628c57e9490feefa0
+Subproject commit 544e6fcc73c5ad9af48a8985c94f0f1d742ef2e0