When used as a shell builtin, this program decoded a subset of arguments known to printf(3) and then used printf() to format it... The only problem what the #define printf out1fmt.  The code was behaving differently when run as a shell builtin since out1fmt() isn't printf(3).
When used as a shell builtin, this program decoded a subset of arguments
known to printf(3) and then used printf() to format it... The only
problem what the #define printf out1fmt.  The code was behaving differently
when run as a shell builtin since out1fmt() isn't printf(3).

Simple hack.  Print to a buffer and fputs (also #defined for sh) the
result.  This should fix the printf builtin problem in PR#1673, rather
than leaving the call commented out.  (printf.o was being statically linked
in anyway, we might as well use it)

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