v1.17: corrected to not use hardcoded connections count for unstaked (backport of #633)

[mergify]

The max unstaked connections can be passed in value in spawn_server. This will make the QOS incorrectly accounting for the real passed in unstaked max connection count. This is used by jito-relayers.

Do not use the hardcoded one.

---

This is an automatic backport of pull request #633 done by Mergify.

[mergify]

Cherry-pick of 592107a has failed:

On branch mergify/bp/v1.17/pr-633
Your branch is up to date with 'origin/v1.17'.

You are currently cherry-picking commit 592107a907.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   streamer/src/nonblocking/quic.rs
	deleted by us:   streamer/src/nonblocking/stream_throttle.rs

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.6%. Comparing base (4f9c393) to head (5148853).

Additional details and impacted files

@@           Coverage Diff           @@
##            v1.17     #762   +/-   ##
=======================================
  Coverage    81.6%    81.6%           
=======================================
  Files         806      806           
  Lines      219348   219348           
=======================================
+ Hits       179078   179081    +3     
+ Misses      40270    40267    -3     

[lijunwangs]

@t-nelson and @sakridge can you review this simple change please? Thanks