legacy/trac#12538 replaces most uses of DirPort_set with dir_server_mode, legacy/trac#4483 adds another use of DirPort_set. I don't know what order they'll merge to master, if legacy/trac#12538 merges first, we'll need to replace the DirPort_set in legacy/trac#4483 with dir_server_mode. (There might be commit conflicts due to these changes.)