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/Data/ODBC/ODBC.make

@@ -0,0 +1,65 @@
+#
+# ODBC.make
+#
+# Makefile fragment for finding ODBC library
+#
+
+ifndef POCO_ODBC_INCLUDE
+POCO_ODBC_INCLUDE = /usr/include
+endif
+
+ifndef POCO_ODBC_LIB
+ifeq (0, $(shell test -d /usr/lib/$(OSARCH)-linux-gnu; echo $$?))
+POCO_ODBC_LIB = /usr/lib/$(OSARCH)-linux-gnu
+else ifeq (0, $(shell test -d /usr/lib64; echo $$?))
+POCO_ODBC_LIB = /usr/lib64
+else
+POCO_ODBC_LIB = /usr/lib
+endif
+endif
+
+ifeq ($(LINKMODE),STATIC)
+LIBLINKEXT = .a
+else
+ifeq ($(OSNAME), CYGWIN)
+LIBLINKEXT = $(IMPLIBLINKEXT)
+else
+LIBLINKEXT = $(SHAREDLIBLINKEXT)
+endif
+endif
+
+INCLUDE += -I$(POCO_ODBC_INCLUDE)
+SYSLIBS += -L$(POCO_ODBC_LIB)
+
+##
+## MinGW
+##
+ifeq ($(POCO_CONFIG),MinGW)
+# -DODBCVER=0x0300: SQLHandle declaration issue
+# -DNOMINMAX      : MIN/MAX macros defined in windows conflict with libstdc++
+CXXFLAGS += -DODBCVER=0x0300 -DNOMINMAX
+
+##
+## unixODBC
+##
+else ifeq (0, $(shell test -e $(POCO_ODBC_LIB)/libodbc$(LIBLINKEXT); echo $$?))
+SYSLIBS += -lodbc
+ifeq (0, $(shell test -e $(POCO_ODBC_LIB)/libodbcinst$(LIBLINKEXT); echo $$?))
+SYSLIBS += -lodbcinst
+endif
+COMMONFLAGS += -DPOCO_UNIXODBC
+
+##
+## iODBC
+##
+else ifeq (0, $(shell test -e $(POCO_ODBC_LIB)/libiodbc$(LIBLINKEXT); echo $$?))
+SYSLIBS += -liodbc -liodbcinst
+COMMONFLAGS += -DPOCO_IODBC -I/usr/include/iodbc
+
+# TODO: OSX >= 10.8 deprecated non-Unicode ODBC API functions, silence warnings until iODBC Unicode support
+COMMONFLAGS += -Wno-deprecated-declarations
+
+else
+$(error No ODBC library found. Please install unixODBC or iODBC or specify POCO_ODBC_LIB and try again)
+endif
+