Changed default value of maxpeers from 200 to 50, update docs

[pratikspatil024]

Reference for this commit: https://askubuntu.com/questions/180873/shopt-works-in-command-line-not-found-when-run-in-a-script

[codecov-commenter]

Codecov Report

Base: 56.87% // Head: 56.82% // Decreases project coverage by -0.04% ⚠️

Coverage data is based on head (70cc544) compared to base (02e84ff).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #555      +/-   ##
===========================================
- Coverage    56.87%   56.82%   -0.05%     
===========================================
  Files          606      606              
  Lines        70128    70128              
===========================================
- Hits         39882    39850      -32     
- Misses       26829    26855      +26     
- Partials      3417     3423       +6     

Impacted Files	Coverage Δ
internal/cli/server/config.go	73.04% <100.00%> (ø)
accounts/keystore/watch.go	90.69% <0.00%> (-4.66%)	⬇️
les/distributor.go	75.78% <0.00%> (-3.91%)	⬇️
core/state/trie_prefetcher.go	74.80% <0.00%> (-3.82%)	⬇️
eth/protocols/snap/sync.go	70.07% <0.00%> (-1.43%)	⬇️
les/odr.go	89.02% <0.00%> (-1.22%)	⬇️
p2p/simulations/mocker.go	30.00% <0.00%> (-1.12%)	⬇️
rpc/handler.go	89.24% <0.00%> (-1.08%)	⬇️
miner/worker.go	72.62% <0.00%> (-0.95%)	⬇️
p2p/simulations/network.go	57.76% <0.00%> (-0.88%)	⬇️
... and 14 more

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