improve HTTP write timeout handling

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #1381 (e2af264) into master (e8f7397) will decrease coverage by 0.02%.
The diff coverage is 55.81%.

@@            Coverage Diff             @@
##           master    #1381      +/-   ##
==========================================
- Coverage   51.61%   51.58%   -0.03%     
==========================================
  Files         461      461              
  Lines       58063    58200     +137     
==========================================
+ Hits        29968    30024      +56     
- Misses      25829    25898      +69     
- Partials     2266     2278      +12     

Impacted Files	Coverage Δ
p2p/simulations/adapters/inproc.go	0.00% <0.00%> (ø)
rpc/server.go	76.27% <0.00%> (-8.22%)	⬇️
rpc/types.go	76.47% <ø> (ø)
rpc/http.go	62.83% <35.48%> (-6.92%)	⬇️
node/rpcstack.go	51.51% <45.23%> (-9.10%)	⬇️
rpc/errors.go	70.00% <50.00%> (-7.78%)	⬇️
rpc/handler.go	82.97% <63.15%> (-7.72%)	⬇️
rpc/client.go	85.43% <100.00%> (-0.95%)	⬇️
rpc/json.go	81.20% <100.00%> (+0.25%)	⬆️
rpc/subscription.go	89.80% <100.00%> (ø)
... and 13 more