a number of non-x86 archetectures, most notably I64 and Linux/PPC.

Essentially, the problem is that there is NO way to portably contruct a
va_list at run-time.  Currently, this is done in (at least) execmisc.cpp
(and probobly in js_global.c or wherever format() and friends are)

This provides an alternate method of handling such issues which could
(potentially) solve the problem as well as add float/double support.
Comments are encouraged.  This is *NOT* part of the xpdev build and will
not be until it is tested and the marked ToDo items are dealt with.
Further, it most likely won't be *USED* in Synchronet until v4, or until
it recieves heavy testing on a very wide range of platforms and format
specifiers.

xp_*printf() functions for all the standard *printf() functions should be
written, including asprintf() and vasprintf() from the GNU C library.
This will require a new type argument (XP_PRINTF_TYPE_AUTO perhaps) which
will assume that the passed argument is the correct type.