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/PageCompiler/samples/HTTPTimeServer/Makefile

@@ -0,0 +1,32 @@
+#
+# Makefile
+#
+# Makefile for Poco HTTPTimeServer
+#
+
+include $(POCO_BASE)/build/rules/global
+
+# Cygwin Poco*.dll should be on PATH
+ifeq ($(OSNAME), CYGWIN)
+    PATH       :=$(LIBPATH):$(PATH)
+endif
+
+# Where to find the PageCompiler executable
+PAGECOMPILER   = $(POCO_BUILD)/PageCompiler/bin/$(OSNAME)/$(OSARCH)/cpspc
+
+objects        = HTTPTimeServerApp TimeHandler
+
+target         = HTTPTimeServer
+target_version = 1
+target_libs    = PocoUtil PocoJSON PocoNet PocoXML PocoFoundation
+
+include $(POCO_BASE)/build/rules/exec
+
+ifdef POCO_UNBUNDLED
+        SYSLIBS += -lz -lpcre -lexpat
+endif
+
+# Rule for runnning PageCompiler
+src/%.cpp: src/%.cpsp
+	@echo "** Compiling Page" $<
+	$(SET_LD_LIBRARY_PATH) $(PAGECOMPILER) $<