os: Add -displayfd into -help text
Add -displayfd into -help text. It was mentioned in the man page but seem to have been missed from the -help text. Signed-off-by: Keith Packard <keithp@keithp.com>
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@ -529,6 +529,7 @@ UseMsg(void)
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ErrorF("-cc int default color visual class\n");
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ErrorF("-nocursor disable the cursor\n");
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ErrorF("-core generate core dump on fatal error\n");
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ErrorF("-displayfd fd file descriptor to write display number to when ready to connect\n");
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ErrorF("-dpi int screen resolution in dots per inch\n");
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#ifdef DPMSExtension
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ErrorF("-dpms disables VESA DPMS monitor control\n");
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