pginstaller - pginst: Include Kerberos in the build.

Log Message:
-----------
Include Kerberos in the build.

Modified Files:
--------------
pginst:
README (r1.16 -> r1.17)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/README.diff?r1=1.16&r2=1.17)
pginst/txt:
welcome.rtf (r1.16 -> r1.17)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/txt/welcome.rtf.diff?r1=1.16&r2=1.17)
pginst/wxs:
pginst.wxs (r1.142 -> r1.143)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/wxs/pginst.wxs.diff?r1=1.142&r2=1.143)