bin/47699: dhpcd incompatibility problems.

[christos%zoulas.com@localhost]

>Number:         47699
>Category:       bin
>Synopsis:       dhcpcd behaves differently than dhclient
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Mar 27 15:05:00 +0000 2013
>Originator:     Christos Zoulas
>Release:        NetBSD 5.99.59
>Organization:
        Grvmpivs Maximvs, LTD.
>Environment:
System: NetBSD rebar.astron.com 5.99.59 NetBSD 5.99.59 (GENERIC) #7: Fri Dec 30 
15:19:49 EST 2011 
christos%rebar.astron.com@localhost:/usr/src/sys/arch/amd64/compile/GENERIC 
amd64
Architecture: x86_64
Machine: amd64
>Description:
1. dhcpcd adds an alias address if one is already set for IPv4. There should
   be an option to override the primary address like dhclient does.
2. something leaves behind network routes created for the interface when
   dhcpcd is killed. It should cleanup, because when moving between different
   networks makes one unreachable from another.
>How-To-Repeat:
start dhclient, get address, kill it. change to different network
(with different ip address). In the wireless world join net with different
ssid.
start dhcpcd...
>Fix:
1. add configuration option to override the primary address instead of creating
   aliases.
2. figure out what adds the route, and remove it.