join-ing any open wifi network is now possible

Peter Hessler (phessler@) has committed changes to make it possible to join any open wifi network:

CVSROOT:	/cvs
Module name:	src
Changes by:	phessler@cvs.openbsd.org	2019/01/18 13:24:59

Modified files:
	sys/net80211   : ieee80211_ioctl.c ieee80211_ioctl.h 
	                 ieee80211_node.c 

Log message:
let users automatically use join to connect to any open wifi network.
if a known network is visible, always prefer that instead.

requested by many, OK stsp@

CVSROOT:	/cvs
Module name:	src
Changes by:	phessler@cvs.openbsd.org	2019/01/18 13:25:35

Modified files:
	sbin/ifconfig  : ifconfig.8 ifconfig.c 

Log message:
let users automatically use join to connect to any open wifi network.
if a known network is visible, always prefer that instead.

requested by many, OK stsp@

The ifconfig(8) (and hostname.if(5)) syntax is join "".