pgsql: Remove all traces that suggest that a non-Bison yacc might be

Log Message:
-----------
Remove all traces that suggest that a non-Bison yacc might be supported, and
change build system to use only Bison.  Simplify build rules, make file names
uniform.  Don't build the token table header file where it is not needed.

Modified Files:
--------------
    pgsql:
        configure (r1.602 -> r1.603)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure?r1=1.602&r2=1.603)
        configure.in (r1.564 -> r1.565)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure.in?r1=1.564&r2=1.565)
    pgsql/config:
        programs.m4 (r1.23 -> r1.24)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/config/programs.m4?r1=1.23&r2=1.24)
    pgsql/contrib/cube:
        .cvsignore (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/cube/.cvsignore?r1=1.1&r2=1.2)
        Makefile (r1.21 -> r1.22)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/cube/Makefile?r1=1.21&r2=1.22)
    pgsql/contrib/seg:
        .cvsignore (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/seg/.cvsignore?r1=1.1&r2=1.2)
        Makefile (r1.20 -> r1.21)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/seg/Makefile?r1=1.20&r2=1.21)
    pgsql/doc/src/sgml:
        installation.sgml (r1.311 -> r1.312)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/installation.sgml?r1=1.311&r2=1.312)
    pgsql/src:
        Makefile.global.in (r1.241 -> r1.242)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/Makefile.global.in?r1=1.241&r2=1.242)
    pgsql/src/backend:
        Makefile (r1.129 -> r1.130)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/Makefile?r1=1.129&r2=1.130)
    pgsql/src/backend/bootstrap:
        .cvsignore (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/bootstrap/.cvsignore?r1=1.1&r2=1.2)
        Makefile (r1.36 -> r1.37)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/bootstrap/Makefile?r1=1.36&r2=1.37)
        bootscanner.l (r1.46 -> r1.47)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/bootstrap/bootscanner.l?r1=1.46&r2=1.47)
    pgsql/src/backend/parser:
        .cvsignore (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/.cvsignore?r1=1.1&r2=1.2)
        Makefile (r1.46 -> r1.47)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/Makefile?r1=1.46&r2=1.47)
        keywords.c (r1.199 -> r1.200)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/keywords.c?r1=1.199&r2=1.200)
        parser.c (r1.73 -> r1.74)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parser.c?r1=1.73&r2=1.74)
        scan.l (r1.144 -> r1.145)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/scan.l?r1=1.144&r2=1.145)
    pgsql/src/include:
        Makefile (r1.25 -> r1.26)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/Makefile?r1=1.25&r2=1.26)
    pgsql/src/interfaces/ecpg/preproc:
        Makefile (r1.135 -> r1.136)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/Makefile?r1=1.135&r2=1.136)
    pgsql/src/pl/plpgsql/src:
        .cvsignore (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/.cvsignore?r1=1.1&r2=1.2)
        Makefile (r1.32 -> r1.33)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/Makefile?r1=1.32&r2=1.33)
        pl_comp.c (r1.128 -> r1.129)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/pl_comp.c?r1=1.128&r2=1.129)
        pl_exec.c (r1.217 -> r1.218)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/pl_exec.c?r1=1.217&r2=1.218)
        pl_funcs.c (r1.72 -> r1.73)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/pl_funcs.c?r1=1.72&r2=1.73)
        pl_handler.c (r1.39 -> r1.40)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/pl_handler.c?r1=1.39&r2=1.40)
    pgsql/src/tools/msvc:
        clean.bat (r1.13 -> r1.14)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/tools/msvc/clean.bat?r1=1.13&r2=1.14)
        pgbison.bat (r1.8 -> r1.9)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/tools/msvc/pgbison.bat?r1=1.8&r2=1.9)