Merge branch 'jw/object-name-bitset-to-enum' into next

The unsigned integer that is used as an bitset to specify the kind
of branches interpret_branch_name() function has been changed to
use a dedicated enum type.

* jw/object-name-bitset-to-enum:
  object-name: turn INTERPRET_BRANCH_* constants into enum values

diff --cc object-name.c
Simple merge

diff --cc refs.c
Simple merge