Try multiple URLs at once, this is awful

[binwiederhier]

Relates to #65

[codecov-commenter]

Codecov Report

Merging #66 (047cf4f) into master (1b3f4f4) will increase coverage by 0.19%.
The diff coverage is 62.29%.

@@            Coverage Diff             @@
##           master      #66      +/-   ##
==========================================
+ Coverage   61.53%   61.73%   +0.19%     
==========================================
  Files          25       25              
  Lines        2033     2080      +47     
==========================================
+ Hits         1251     1284      +33     
- Misses        521      536      +15     
+ Partials      261      260       -1     

Impacted Files	Coverage Δ
config/util.go	60.71% <0.00%> (-20.24%)	⬇️
util/http.go	62.50% <25.00%> (-37.50%)	⬇️
client/client.go	53.03% <40.00%> (-1.02%)	⬇️
cmd/join.go	64.70% <89.18%> (+12.00%)	⬆️
server/server.go	79.31% <0.00%> (+1.23%)	⬆️

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