optimize: zero idle timeout acts the same

[welkeyever]

What type of PR is this?

optimize

Check the PR title.

• This PR title match the format: <type>(optional scope): <description>
• The description of this PR title is user-oriented and clear enough for others to understand.

(Optional) Translate the PR title into Chinese.

设置 idle timeout 为 0 在不同的网络库下行为一致

(Optional) More detail description for this PR(en: English/zh: Chinese).

en: before this, standard network cannot process requests properly when idle timeout is set to zero, this may be confusing to users.
zh(optional): 在此之前，标准网络在空闲超时设置为零时无法正确处理请求，这可能会让用户感到困惑。

Which issue(s) this PR fixes:

None

[codecov]

Codecov Report

Base: 66.54% // Head: 66.50% // Decreases project coverage by -0.03% ⚠️

Coverage data is based on head (6be28d4) compared to base (c89d7ac).
Patch coverage: 66.66% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #357      +/-   ##
===========================================
- Coverage    66.54%   66.50%   -0.04%     
===========================================
  Files           89       89              
  Lines         8507     8512       +5     
===========================================
  Hits          5661     5661              
- Misses        2484     2489       +5     
  Partials       362      362              

Impacted Files	Coverage Δ
pkg/common/test/mock/network.go	0.00% <0.00%> (ø)
pkg/protocol/http1/server.go	0.00% <ø> (ø)
pkg/route/engine.go	62.88% <100.00%> (+0.24%)	⬆️
pkg/common/compress/compress.go	80.95% <0.00%> (-2.86%)	⬇️

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