[tex-live] 2023 pretest available for testing []

[Karl Berry]

    To be able to compile here the current source with
       --with-system-potrace
    ...
     # KPSE_POTRACE_SYSTEM_FLAGS
     # ------------------------
    -AC_DEFUN([KPSE_POTRACE_SYSTEM_FLAGS], [dnl
    -_KPSE_PKG_CONFIG_FLAGS([POTRACE], [POTRACE])])
    +AC_DEFUN([KPSE_POTRACE_SYSTEM_FLAGS], [_KPSE_LIB_FLAGS_SYSTEM([potrace], [potrace])])

    as otherwise the configure script breaks on detecting and using
    the libpotrace. AFAIK the potrace does not have a pkgconfig .pc
    file as well as upper case `POTRACE' would not match.

Thanks Werner. I applied the change and reautoconfed (r66135). -k