t / t4110 / expecton commit http-push: convert some static functions to struct object_id (8eb9460)
   1a1
   2a11
   3a111
   4a1111
   5b1
   6b11
   7b111
   8b1111
   9b2
  10b22
  11b222
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  13c1
  14c11
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  16c1111
  17c2
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