Fix a probable gvisor panic on peer disconnect

[Zensey]

[codecov-commenter]

Codecov Report

Merging #5426 (f74ff77) into master (28b74a6) will decrease coverage by 0.14%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5426      +/-   ##
==========================================
- Coverage   38.07%   37.93%   -0.15%     
==========================================
  Files         358      358              
  Lines       19882    19882              
==========================================
- Hits         7570     7542      -28     
- Misses      11573    11592      +19     
- Partials      739      748       +9     

Impacted Files	Coverage Δ
nat/traversal/pinger.go	73.64% <0.00%> (-5.82%)	:arrow_down:
core/policy/oracle.go	86.48% <0.00%> (-5.41%)	:arrow_down:
requests/dialer_swarm.go	75.93% <0.00%> (-3.01%)	:arrow_down:
p2p/channel.go	66.06% <0.00%> (-0.73%)	:arrow_down:
session/pingpong/consumer_balance_tracker.go	56.63% <0.00%> (-0.72%)	:arrow_down:

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[Snawoot]

I think you could write it like this instead:

		wg.Add(2)
		go func() {
			defer wg.Done()
			tun.proxy(client, clientAddr, proxyConn) // loc <- remote
		}()
		go func() {
			defer wg.Done()
			tun.proxy(proxyConn, remoteAddr, client) // remote <- loc
		}
		wg.Wait()

to get rid of that useless wg parameter which actually belongs to outer function mechanics