bin/39663: Add GNU screen 256 colors support

[zecrazytux%zecrazytux.net@localhost]

>Number:         39663
>Category:       bin
>Synopsis:       Currently no 256 colors support in GNU screen
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Wed Oct 01 09:15:00 +0000 2008
>Originator:     zecrazytux
>Release:        NetBSD 4.99.72
>Organization:
        
>Environment:
System: NetBSD home.zecrazytux.net 4.99.72 NetBSD 4.99.72 (GENERIC) #0: Wed Sep 
10 10:00:04 PDT 2008 
builds@wb26:/home/builds/ab/HEAD/i386/200809100002Z-obj/home/builds/ab/HEAD/src/sys/arch/i386/compile/GENERIC
 i386
Architecture: i386
Machine: i386
>Description:
                There's currently no 256 colors support in GNU screen (pkgsrc 
misc/screen).
                Please add that feature !
>How-To-Repeat:
                Any build of misc/screen.
>Fix:
                Add this line to the Makefile:
                CONFIGURE_ARGS+=        --enable-colors256