am f48d6abf: Merge "Switch writing to <utils/file.h>."

* commit 'f48d6abfb701cedbf619fb530e69a4a245ad0697':
  Switch writing to <utils/file.h>.
tree: 92e3420f70b4da1c9d54656813c120d53dace423
  1. client/
  2. include/
  3. server/