Merge remote-tracking branch 'upstream/master' into nx

# Conflicts:
#	src/core/CMakeLists.txt
#	src/core/arm/dynarmic/arm_dynarmic.cpp
#	src/core/arm/dyncom/arm_dyncom.cpp
#	src/core/hle/kernel/process.cpp
#	src/core/hle/kernel/thread.cpp
#	src/core/hle/kernel/thread.h
#	src/core/hle/kernel/vm_manager.cpp
#	src/core/loader/3dsx.cpp
#	src/core/loader/elf.cpp
#	src/core/loader/ncch.cpp
#	src/core/memory.cpp
#	src/core/memory.h
#	src/core/memory_setup.h

externals/CMakeLists.txt

@@ -1,5 +1,8 @@
 # Definitions for all external bundled libraries
 
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/CMakeModules)
+include(DownloadExternals)
+
 # Catch
 add_library(catch-single-include INTERFACE)
 target_include_directories(catch-single-include INTERFACE catch/single_include)
@@ -46,6 +49,10 @@ add_subdirectory(soundtouch)
 # The SoundTouch target doesn't export the necessary include paths as properties by default
 target_include_directories(SoundTouch INTERFACE ./soundtouch/include)
 
+# Unicorn
+add_library(unicorn-headers INTERFACE)
+target_include_directories(unicorn-headers INTERFACE ./unicorn/include)
+
 # Xbyak
 if (ARCHITECTURE_x86_64)
     # Defined before "dynarmic" above
@@ -59,9 +66,21 @@ add_subdirectory(enet)
 target_include_directories(enet INTERFACE ./enet/include)
 
 if (ENABLE_WEB_SERVICE)
+    # msys installed curl is configured to use openssl, but that isn't portable
+    # since it relies on having the bundled certs install in the home folder for SSL
+    # by default on mingw, download the precompiled curl thats linked against windows native ssl
+    if (MINGW AND CITRA_USE_BUNDLED_CURL)
+        download_bundled_external("curl/" "curl-7_55_1" CURL_PREFIX)
+        set(CURL_PREFIX "${CMAKE_BINARY_DIR}/externals/curl-7_55_1")
+        set(CURL_FOUND YES)
+        set(CURL_INCLUDE_DIR "${CURL_PREFIX}/include" CACHE PATH "Path to curl headers")
+        set(CURL_LIBRARY "${CURL_PREFIX}/lib/libcurldll.a" CACHE PATH "Path to curl library")
+        set(CURL_DLL_DIR "${CURL_PREFIX}/lib/" CACHE PATH "Path to curl.dll")
+        set(USE_SYSTEM_CURL ON CACHE BOOL "")
+    endif()
     # CPR
-    option(BUILD_TESTING OFF)
-    option(BUILD_CPR_TESTS OFF)
+    set(BUILD_TESTING OFF CACHE BOOL "")
+    set(BUILD_CPR_TESTS OFF CACHE BOOL "")
     add_subdirectory(cpr)
     target_include_directories(cpr INTERFACE ./cpr/include)