msvcrt: stricter format checking in printf

Jesse Allen the3dfxdude at
Mon Dec 19 12:01:00 CST 2005

Hi, this patch fixes problems with allowing uppercase versions of
formats to be interpreted like %D and %d, and fixes various
interpretations between 'I' size and 'i' format types when support is
added later.

Require exact uppercase and lowercase format checking in printf
routines, but still tolower the format before rebuilding the format
string for libc's printf.  Includes a testcase.
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