[imp] Reply using wrong address for google groups

[Patrick Domack]

Google is complicating things and atleast the latest version of imp is  
selecting the wrong return address when I attempt to reply to a list  
message.

List-Post:  
<http://groups.google.com/group/aprx-software/post?hl=en_US>,  
<mailto:aprx-software at googlegroups.com>
List-Help: <http://groups.google.com/support/?hl=en_US>,  
<mailto:aprx-software+help at googlegroups.com>

Currently imp is using the http:// one, cause it comes first.