python - ctl: Add HBA configuration management interfaces.

Log Message:
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Add HBA configuration management interfaces.

The inplace editor works as specified, but will not actually produce the desired
effect. Currently, it merely mimics the *exact* formatting of the line the new
entry is associated with. This is not what is truly desired AFA the formatting
of the HBA columns is concerned. It seems that in some cases complete
reformatting of all columns may be necessary. Also, non-destructive alteration--
wrt column alignment, not comments by any means--may never be possible due to
assumptions that would have to be made about tab spacing. So, the next version
[of Sequence] will likely be a rewrite that actually reformats the HBA using
single spaces for column alignment; of course, all while keeping comments.

Added Files:
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    ctl/src:
        hba.py (r1.1)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/ctl/src/hba.py?rev=1.1&content-type=text/x-cvsweb-markup)
    ctl/test:
        hba.py (r1.1)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/ctl/test/hba.py?rev=1.1&content-type=text/x-cvsweb-markup)