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vmaffione
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2020-02-20T21:48:36.482593Z
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MFC r356523

bhyve: add wrapper for debug printf statements

Add printf() wrapper to use CR/CRLF terminators depending on whether
stdio is mapped to a tty open in raw mode.
Try to use the wrapper everywhere.
For now we leave the custom DPRINTF/WPRINTF defined by device
models, but we may remove them in the future.

Reviewed by:    grehan, jhb
Differential Revision:  https://reviews.freebsd.org/D22657

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