optimize: add WithDialFunc for client

[li-jin-gou]

What type of PR is this?

optimize

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Client 添加 WithDialFunc

Which issue(s) this PR fixes:

#445 (comment)

[codecov]

Codecov Report

Base: 69.61% // Head: 69.64% // Increases project coverage by +0.03% 🎉

Coverage data is based on head (c505c4c) compared to base (257685e).
Patch coverage: 78.26% of modified lines in pull request are covered.

❗ Current head c505c4c differs from pull request most recent head 6ab76b3. Consider uploading reports for the commit 6ab76b3 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #447      +/-   ##
===========================================
+ Coverage    69.61%   69.64%   +0.03%     
===========================================
  Files           93       93              
  Lines         8752     8774      +22     
===========================================
+ Hits          6093     6111      +18     
- Misses        2297     2299       +2     
- Partials       362      364       +2     

Impacted Files	Coverage Δ
pkg/app/server/option.go	98.55% <71.42%> (-1.45%)	⬇️
pkg/app/client/option.go	96.51% <78.57%> (-3.49%)	⬇️
pkg/common/config/option.go	100.00% <100.00%> (ø)
pkg/route/engine.go	63.19% <100.00%> (ø)
pkg/common/compress/compress.go	80.95% <0.00%> (-2.86%)	⬇️
pkg/common/timer/timer.go	80.95% <0.00%> (+19.04%)	⬆️

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[kolinfluence]

is this merging? having trouble with existing reverse proxy feature with h2