Fix mdns buffer overrun by 1 (#4317)
Fix mdns buffer overrun by 1 (#4317)

* fix mdns buffer overflow, minor indent/prettify

wemos/Arduino,sticilface/Arduino,esp8266/Arduino,esp8266/Arduino,Lan-Hekary/Arduino,lrmoreno007/Arduino,Lan-Hekary/Arduino,lrmoreno007/Arduino,Adam5Wu/Arduino,wemos/Arduino,wemos/Arduino,sticilface/Arduino,Lan-Hekary/Arduino,hallard/Arduino,lrmoreno007/Arduino,Adam5Wu/Arduino,Adam5Wu/Arduino,sticilface/Arduino,sticilface/Arduino,esp8266/Arduino,Adam5Wu/Arduino,wemos/Arduino,sticilface/Arduino,hallard/Arduino,Lan-Hekary/Arduino,lrmoreno007/Arduino,wemos/Arduino,hallard/Arduino,hallard/Arduino,Lan-Hekary/Arduino,esp8266/Arduino,hallard/Arduino,esp8266/Arduino,Adam5Wu/Arduino,lrmoreno007/Arduino