Add compile_confdb_app function

Function is able to compile and link application with -lconfdb or
-lcmap depending on /usr/include/cmap.h file existence. USE_CONFDB or
USE_CMAP macros are defined allowing one app to use ether confdb or cmap
calls.
sigpipe-on-confdb-exit doesn't need coroversion
Make confdb-track-and-change.c msgs recognizable