WebSocket connection: debug is not defined

[cmotelet]

this. is missing at:
https://github.com/SignalK/signalk-server/blob/master/packages/streams/mdns-ws.js#L37-L42
PR in progress...

Error log:
Feb 05 12:08:28 ReferenceError: debug is not defined at new MdnsWs (/usr/lib/node_modules/signalk-server/node_modules/@signalk/streams/mdns-ws.js:37:3) at Object.signalKInput [as SignalK] (/usr/lib/node_modules/signalk-server/node_modules/@signalk/streams/simple.js:344:13) at new Simple (/usr/lib/node_modules/signalk-server/node_modules/@signalk/streams/simple.js:79:34) at createPipeElement (/usr/lib/node_modules/signalk-server/lib/pipedproviders.js:76:16) at /usr/lib/node_modules/signalk-server/lib/pipedproviders.js:49:30 at Array.reduce () at createPipedProvider (/usr/lib/node_modules/signalk-server/lib/pipedproviders.js:47:55) at /usr/lib/node_modules/signalk-server/lib/pipedproviders.js:83:37 at Array.reduce () at Object.startProviders [as start] (/usr/lib/node_modules/signalk-server/lib/pipedproviders.js:80:62) at /usr/lib/node_modules/signalk-server/lib/index.js:277:66 at createServer (/usr/lib/node_modules/signalk-server/lib/index.js:395:5) at /usr/lib/node_modules/signalk-server/lib/index.js:264:13 at new Promise () at Server.start (/usr/lib/node_modules/signalk-server/lib/index.js:263:16) at Object. (/usr/lib/node_modules/signalk-server/bin/signalk-server:26:8) at Module._compile (node:internal/modules/cjs/loader:1101:14) at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10) at Module.load (node:internal/modules/cjs/loader:981:32) at Function.Module._load (node:internal/modules/cjs/loader:822:12) at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12) at node:internal/main/run_main_module:17:47