Improve documentation by making all of the colors used readable,
no matter what the background color is.
Dark blue on a black background is unreadable, as is yellow on a
light background. This patch turns on the bright attribute for
colors when on a dark background and turns *off* the bright
attribute when the -W command line option is used (indicating a
_light_ background). This ensures that text is readable in both
cases.
Patch by: tilghman
Review: https://reviewboard.asterisk.org/r/2224
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Merged revisions 377509 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 377510 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 377511 from http://svn.asterisk.org/svn/asterisk/branches/11
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@377512
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