1) adds NetBSD shared lib support on both ELF and a.out platforms

        2) replaces "-L$(LIBPQDIR) -lpq" with "$(LIBPQ)" defined in
           Makefile.global.  This makes it much easier to build stuff in
           the source tree after you've already installed the libraries.

        3) adds TEMPLATEDIR in Makefile.global that indicates where the
           database templates are stored.  This separates the template files
           from real libraries that are installed in $(LIBDIR).
        4) changes include order of <readline/readline.h> and <readline.h>.
           The latest GNU readline installs its headers under a readline
           subdirectory.

In addition to applying the patch below the following files need to be copied:

        backend/port/dynloader:
                bsd.h -> netbsd.h
                bsd.c -> netbsd.c
        include/port:
                bsd.h -> netbsd.h
        makefiles:
                Makefile.bsd -> Makefile.netbsd

It would be great to see this incorporated into the source tree before
the 7.0 release is cut.

        Thanks!

     -- Johnny C. Lam <lamj@stat.cmu.edu>