pginstaller - pginst: Update to work with WiX 2.0.2110.0: * Strict

Log Message:
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Update to work with WiX 2.0.2110.0:

* Strict checking of short names <= 8 characters, fix all other instances.
* Name and LongName can't both be used when they are identical. Also needed fix in the perl utility scripts.
* dash (-) not permitted in identifier.
* FileGroup element removed. Replaced with include files generated using new script buildflist.pl.
* Warned about a couple of components (shortcut to contrib docs, some Npgsql files in a subdir) that weren't attached
toa feature - fixed. 

This commit means WiX 2.0.2110 is now required to build the installer (I think).

Modified Files:
--------------
    pginst:
        Makefile (r1.20 -> r1.21)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/Makefile.diff?r1=1.20&r2=1.21)
    pginst/util:
        builddir.pl (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/util/builddir.pl.diff?r1=1.3&r2=1.4)
    pginst/wxi:
        Makefile (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/wxi/Makefile.diff?r1=1.5&r2=1.6)
    pginst/wxs:
        pginst.wxs (r1.73 -> r1.74)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/wxs/pginst.wxs.diff?r1=1.73&r2=1.74)

Added Files:
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    pginst/util:
        buildflist.pl (r1.1)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/util/buildflist.pl?rev=1.1&content-type=text/x-cvsweb-markup)