[cups.bugs] [LOW] STR #2861: HostNameLookups values documentation and interpretation skew

[martin.pitt.canonical]

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[STR New]

This patch keeps backwards compatibility, and makes it compatible with the
documentation (Yes/No). I also added true/false, since they are accepted
for other boolean options, too.

Link: http://www.cups.org/str.php?L2861
Version: 1.3.7