Optimize MDNS to prevent overflow and endless loop

[me-no-dev]

No description provided.

[codecov-io]

Current coverage is 27.62% (diff: 100%)

Merging #2333 into master will not change coverage

@@             master      #2333   diff @@
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  Files            20         20          
  Lines          3656       3656          
  Methods         335        335          
  Messages          0          0          
  Branches        678        678          
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  Hits           1010       1010          
  Misses         2468       2468          
  Partials        178        178          

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[me-no-dev]

Connected to:
#2248
#2169
#2151
#2020

[me-no-dev]

mDNS query _arduino._tcp
2 service(s) found
1: (192.168.254.182:8266) esp-test
2: (192.168.254.156:22) piduino1
mDNS query _http._tcp
2 service(s) found
1: (192.168.254.182:80) esp-test
2: (192.168.254.194:80) HP LaserJet CP1025nw
mDNS query _ipp._tcp
1 service(s) found
1: (192.168.254.194:631) HP LaserJet CP1025nw
mDNS query _afpovertcp._tcp
1 service(s) found
1: (192.168.254.49:548) Hristo's Time Capsule
mDNS query _smb._tcp
1 service(s) found
1: (192.168.254.49:445) Hristo's Time Capsule
mDNS query _ftp._tcp
0 service(s) found