A bit of OIDmap API enhancement and cleanup.
Comments?
* sk/oidmap-clear-with-custom-free-func:
sequencer: use oidmap_clear_with_free() for string_entry cleanup
odb: use oidmap_clear_with_free() to release replace_map entries
list-objects-filter: use oidmap_clear_with_free() for cleanup
builtin/rev-list: migrate missing_objects cleanup to oidmap_clear_with_free()
oidmap: make entry cleanup explicit in oidmap_clear