Merge branch 'et/spell-poll-infinite-with-minus-one-only'

We used to pass -1000 to poll(2), expecting it to also mean "no
timeout", which should be spelled as -1.

* et/spell-poll-infinite-with-minus-one-only:
  upload-pack: keep poll(2)'s timeout to -1

diff --cc upload-pack.c
Simple merge