pgsql: Ship documentation without intermediate tarballs Documentation

Log Message:
-----------
Ship documentation without intermediate tarballs

Documentation files in HTML and man formats are now prepared for
distribution using the distprep make target, like everything else.  They
are placed in doc/src/sgml/html and manX and installed from there by
make install, if present.  The business with the tarballs in the tarball
is gone.

Modified Files:
--------------
    pgsql:
        GNUmakefile.in (r1.51 -> r1.52)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/GNUmakefile.in?r1=1.51&r2=1.52)
    pgsql/doc:
        Makefile (r1.38 -> r1.39)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/Makefile?r1=1.38&r2=1.39)
    pgsql/doc/src:
        Makefile (r1.36 -> r1.37)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/Makefile?r1=1.36&r2=1.37)
    pgsql/doc/src/sgml:
        Makefile (r1.121 -> r1.122)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/Makefile?r1=1.121&r2=1.122)
        docguide.sgml (r1.77 -> r1.78)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/docguide.sgml?r1=1.77&r2=1.78)
        stylesheet.dsl (r1.34 -> r1.35)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/stylesheet.dsl?r1=1.34&r2=1.35)
        stylesheet.xsl (r1.3 -> r1.4)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/stylesheet.xsl?r1=1.3&r2=1.4)
    pgsql/src:
        Makefile.global.in (r1.256 -> r1.257)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/Makefile.global.in?r1=1.256&r2=1.257)