[patch] Insulate cvsimport test from CVSREAD=1

This small patch allows "make test" to finish successfully,
at least according to Git 1.5.4.4.

thi

________________________________________________________
commit 7b25916f06c80cd5fa889840195dcf8efd1bee66
Author: Thien-Thi Nguyen [off-list ref]
Date:   Sat Mar 15 09:52:12 2008 +0100

    Insulate cvsimport test from CVSREAD=1
    
    * t/t9600-cvsimport.sh: Unset env var CVSREAD.
    
    Signed-off-by: Thien-Thi Nguyen [off-list ref]

diff --git a/t/t9600-cvsimport.sh b/t/t9600-cvsimport.sh
index 7706430..fdbe474 100755
--- a/t/t9600-cvsimport.sh
+++ b/t/t9600-cvsimport.sh

@@ -28,6 +28,8 @@ esac
 
 CVSROOT=$(pwd)/cvsroot
 export CVSROOT
+# prevent cvs from making files read-only
+unset CVSREAD
 # for clean cvsps cache
 HOME=$(pwd)
 export HOME