4487. [test] Make system tests work on Windows. [RT #42931]

bin/tests/system/rpz/tests.sh

@@ -106,7 +106,7 @@ restart () {
 	    PID=`cat ns$1/named.pid 2>/dev/null`
 	    if test -n "$PID"; then
 		echo "I:killing ns$1 server $PID"
-		kill -9 $PID
+		$KILL -9 $PID
 	    fi
 	fi
     fi
@@ -438,7 +438,7 @@ nochange a5-1-2.tld2
 end_group
 ckstats $ns3 'radix tree deletions' ns3 0
 
-if ./rpz nsdname; then
+if $RPZ nsdname; then
     # these tests assume "min-ns-dots 0"
     start_group "NSDNAME rewrites" test3
     nochange a3-1.tld2			# 1
@@ -459,7 +459,7 @@ else
     echo "I:NSDNAME not checked; named configured with --disable-rpz-nsdname"
 fi
 
-if ./rpz nsip; then
+if $RPZ nsip; then
     # these tests assume "min-ns-dots 0"
     start_group "NSIP rewrites" test4
     nxdomain a3-1.tld2			# 1 NXDOMAIN for all of tld2