K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2018-10-20T18:31:36.882488Z
K 7
svn:log
V 200
Replace ttyprintf with sbuf_printf and tty drain routine

Add string variants of cnputc and tty_putchar, and use them from the tty
sbuf drain routine.

Suggested by:	ed@
Sponsored by:	Dell EMC Isilon

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