0.3.3 (test build): Printer detection

Since 0.3.2:
Printer detection made more robust. The search query is now repeated, so a single lost packet no longer leaves the list empty, and printers that answer without stating their own address are now listed instead of having to be added by IP address.

Printers confirmed working so far: Epson EW-M630T (network and USB), HP Envy, Brother HL-L3210CW and MFC-L3720CDW.

Brother owners: please try adding the printer again from the list, and report results at Haiku forums.

To install: pkgman install ipp_everywhere-0.3.3-1-x86_64.hpkg (or double-click the package).