python - fe: os.getlogin is not portable.

Log Message:
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os.getlogin is not portable. So just use the hostname instead of user@host :(

Modified Files:
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fe/src:
tracenull.py (r1.1.1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/src/tracenull.py.diff?r1=1.1.1.1&r2=1.2)