pginstaller - pginst: Add zlib.dll Additional cleanups for 8.0.

Log Message:
-----------
Add zlib.dll
Additional cleanups for 8.0.

Modified Files:
--------------
pginst:
Makefile (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/Makefile.diff?r1=1.8&r2=1.9)
Makefile.config (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/Makefile.config.diff?r1=1.7&r2=1.8)
pginst/wxs:
pginst.wxs (r1.33 -> r1.34)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/wxs/pginst.wxs.diff?r1=1.33&r2=1.34)