[Toybox] [PATCH] telnet: just use dprintf() for IAC sequences.

[enh]

I don't see the need for the separate buffer, and just using dprintf()
directly is less code. The only downside really is having to get the
right number of `%c`s in your format string.
---
 toys/pending/telnet.c | 53 ++++++++++---------------------------------
 1 file changed, 12 insertions(+), 41 deletions(-)
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