nodiscover option fix

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #843 (598b38e) into master (dd7756f) will increase coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #843      +/-   ##
==========================================
+ Coverage   49.10%   49.12%   +0.01%     
==========================================
  Files         419      419              
  Lines       47795    47797       +2     
==========================================
+ Hits        23470    23480      +10     
+ Misses      22267    22266       -1     
+ Partials     2058     2051       -7     

Impacted Files	Coverage Δ
cmd/utils/flags.go	2.04% <0.00%> (-0.01%)	⬇️
ctxc/backend.go	0.00% <0.00%> (ø)
ctxc/discovery.go	0.00% <0.00%> (ø)
p2p/simulations/http.go	66.02% <0.00%> (-0.65%)	⬇️
ctxc/downloader/downloader.go	76.47% <0.00%> (-0.22%)	⬇️
p2p/discover/v5_udp.go	81.33% <0.00%> (+0.26%)	⬆️
trie/proof.go	73.81% <0.00%> (+0.36%)	⬆️
p2p/server.go	65.52% <0.00%> (+0.42%)	⬆️
ctxc/downloader/queue.go	80.59% <0.00%> (+0.53%)	⬆️
p2p/simulations/network.go	58.44% <0.00%> (+0.86%)	⬆️
... and 2 more