Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/JWT/CMakeLists.txt

@@ -0,0 +1,37 @@
+# Sources
+file(GLOB SRCS_G "src/*.cpp")
+POCO_SOURCES_AUTO(SRCS ${SRCS_G})
+
+# Headers
+file(GLOB_RECURSE HDRS_G "include/*.h")
+POCO_HEADERS_AUTO(SRCS ${HDRS_G})
+
+# Version Resource
+if(MSVC AND BUILD_SHARED_LIBS)
+	source_group("Resources" FILES ${PROJECT_SOURCE_DIR}/DLLVersion.rc)
+	list(APPEND SRCS ${PROJECT_SOURCE_DIR}/DLLVersion.rc)
+endif()
+
+add_library(JWT ${SRCS})
+add_library(Poco::JWT ALIAS JWT)
+set_target_properties(JWT
+	PROPERTIES
+	VERSION ${SHARED_LIBRARY_VERSION} SOVERSION ${SHARED_LIBRARY_VERSION}
+	OUTPUT_NAME PocoJWT
+	DEFINE_SYMBOL JWT_EXPORTS
+)
+
+target_link_libraries(JWT PUBLIC Poco::JSON Poco::Crypto)
+target_include_directories(JWT
+	PUBLIC
+		$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+		$<INSTALL_INTERFACE:include>
+	PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src
+)
+
+POCO_INSTALL(JWT)
+POCO_GENERATE_PACKAGE(JWT)
+
+if(ENABLE_TESTS)
+	add_subdirectory(testsuite)
+endif()