chore, check for MAP_ANON in c.ac

Signed-off-by: Sebastian Freundt <freundt@fresse.org>
minor, if MAP_ANON needs _DARWIN_SOURCE define it in tzraw.c

Signed-off-by: Sebastian Freundt <freundt@fresse.org>
chore, include config.h in prchunk.c

Signed-off-by: Sebastian Freundt <freundt@fresse.org>
minor, if MAP_ANON needs _DARWIN_SOURCE define it in prchunk.c

Signed-off-by: Sebastian Freundt <freundt@fresse.org>
Merge branch 'bld/dist' into next

* bld/dist:
  minor, if MAP_ANON needs _DARWIN_SOURCE define it in prchunk.c
  chore, include config.h in prchunk.c
  minor, if MAP_ANON needs _DARWIN_SOURCE define it in tzraw.c
  chore, check for MAP_ANON in c.ac