Zeroconf.app: Handle _scanner._tcp

`skanlite` seems to recognize

```
= em0 IPv4 HP LaserJet 200 colorMFP M276n (...) _scanner._tcp local
hostname = [....local]
address = [...]
port = [8289]
txt = ["note=" "flatbed=T" "feeder=T" "button=T" "mdl=200 colorMFP M276n" "mfg=Hewlett Packard" "ty=HP LaserJet 200 colorMFP M276n" "adminurl=http://....local." "txtvers=1"]

= em0 IPv4 HP LaserJet 200 colorMFP M276n (...) _ipp._tcp local
hostname = [....local]
address = [192.168.0.30]
port = [631]
txt = ["mac=..." "usb_MDL=HP LaserJet 200 colorMFP M276n" "usb_MFG=Hewlett-Packard" "UUID=..." "Fax=T" "Scan=T" "Duplex=F" "Color=T" "note=" "adminurl=http://....local." "priority=10" "product=(HP LaserJet 200 colorMFP M276n)" "ty=HP LaserJet 200 colorMFP M276n" "URF=V1.1,CP99,W8,OB10,PQ3-4-5,ADOBERGB24,DEVRGB24,DEVW8,SRGB24,IS1-4,MT1-2-3-5-12,RS600" "rp=ipp/print" "pdl=application/postscript,application/vnd.hp-PCL,application/vnd.hp-PCLXL,application/pdf,image/urf" "qtotal=1" "txtvers=1"]
```

but then ends with


`xsane` gives:


Semi-related discussion:
https://github.com/helloSystem/ISO/issues/58