Merge branch 'hv/assume-priumax-is-available-anywhere'

We have had compatibility fallback macro definitions for "PRIuMAX",
"PRIu32", etc. but did not for "PRIdMAX", while the code used the
last one apparently without any hiccup reported recently.  The
fallback macro definitions for these <inttypes.h> macros that must
appear in C99 systems have been removed.

* hv/assume-priumax-is-available-anywhere:
  git-compat-util.h: drop the `PRIuMAX` and other fallback definitions