Remove restart ack timeout

[dirkmc]

This PR

• removes the restart ack timeout
• allows the accept and complete timeouts to be disabled

Because graphsync rate limits the number of requests for data that it will respond to, it's not possible to rely on these timeouts in uncontrolled environments.

More detail here: filecoin-project/lotus#6343 (comment)

[codecov-commenter]

Codecov Report

Merging #211 (914b702) into master (3a130c3) will decrease coverage by 0.05%.
The diff coverage is 55.55%.

@@            Coverage Diff             @@
##           master     #211      +/-   ##
==========================================
- Coverage   65.05%   65.00%   -0.06%     
==========================================
  Files          24       24              
  Lines        2627     2600      -27     
==========================================
- Hits         1709     1690      -19     
+ Misses        575      570       -5     
+ Partials      343      340       -3     

Impacted Files	Coverage Δ
channelmonitor/channelmonitor.go	72.63% <55.55%> (-1.57%)	⬇️
network/libp2p_impl.go	72.26% <0.00%> (+3.36%)	⬆️

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[aarshkshah1992]

@dirkmc Why reported a problem because of this on Estuary

12D3KooWCVXs8P7iq6ao4XhfAmKWrEeuKFWCJgqe9jGDMTqHYBjw-12D3KooWDMpcct12Vb6jPXwjvLQHA2hoP8XKGbUZ2tpue1ydoZUm-1622579291962288043: after 16 consecutive restarts failed to transfer any data

Can we get this out as well in a Lotus/Markets release ? I don't think the recent Markets v1.4.0 change includes this PR.

[dirkmc]

It was merged into lotus last night:
filecoin-project/lotus#6369
I branched v1.6.0 off an earlier commit to avoid some other big refactors in go-data-transfer master - I wanted to have a minimal set of changes to reduce the chance of a regression. Planning to merge and test the other changes this week.