yanic query: allow setting non default destination port

[herbetom]

Currently it seems as if yanic query doesn't allow to set a destination port and instead alwas 1001 is beeing used.

For testing purposes it would be great if a option would be available to query devices on another port.

I only see a --port flag which can be used to change the source port.

[maurerle]

In yanic query, we land here:

yanic/respond/collector.go

Lines 225 to 228 in 35e9253

	func (coll *Collector) sendPacket(conn *net.UDPConn, destination net.IP) {
	addr := net.UDPAddr{
	IP: destination,
	Port: PortDefault,

so we need to allow setting a port param to this function and the queryCmd for this to work

[genofire]

thats correct, we need therefore a bypass of parameter ...

current i am to lazy for developing it, sry.
every component on freifunk use this port, so i will focus on more importent things ...

but i will review and merge it, if some else develop it.
i believe it is an good first issue.