pkg/44689: IPv6 support disabled by default in chat/irssi

[ftigeot%wolfpond.org@localhost]

>Number:         44689
>Category:       pkg
>Synopsis:       IPv6 support disabled by default in chat/irssi
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    pkg-manager
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Sat Mar 05 21:05:00 +0000 2011
>Originator:     Francois Tigeot
>Release:        DragonFly 2.9-DEVELOPMENT
>Organization:
>Environment:
DragonFly sekishi.zefyris.com 2.9-DEVELOPMENT DragonFly 
v2.9.1.786.gda4f7-DEVELOPMENT #13: Sun Feb 27 18:17:58 CET 2011     
ftigeot%sekishi.zefyris.com@localhost:/usr/obj/usr/src/sys/BADAXE64  x86_64
>Description:
By default, IPv6 support is disabled in chat/irssi

I lost many hours trying to understand why I could not connect to some servers 
or only on IPv4 for the ones which had both IPv4 and IPv6 addresses.
>How-To-Repeat:
Install chat/irssi without any option set in mk.conf
>Fix:
The following code is present in options.mk:

.if !empty(PKG_OPTIONS:Minet6)
CONFIGURE_ARGS+=        --enable-ipv6
.else
CONFIGURE_ARGS+=        --disable-ipv6
.endif

Its logic should be reversed and the --disable-ipv6 configure arg only
used when IPv6 is explicitely disabled in mk.conf.