4304. [port] xfer system test failed as 'tail -n +value' is not

                        portable. [RT #41315]

CHANGES

+4304.	[port]		xfer system test failed as 'tail -n +value' is not
+			portable. [RT #41315]
+
 4303.	[bug]		"dig +subnet" was unable to send a prefix length of
 			zero, as it was incorrectly changed to 32 for v4
 			prefixes or 128 for v6 prefixes. In addition to

bin/tests/system/xfer/tests.sh

@@ -257,7 +257,7 @@ do
 	sleep 1
 done
 
-tail -n +"$cur" < ns4/named.run | grep "Transfer status: success" > /dev/null || {
+sed -n "$cur,\$p" < ns4/named.run | grep "Transfer status: success" > /dev/null || {
     echo "I: failed: expected status was not logged"
     status=1
 }
@@ -277,7 +277,7 @@ $RNDCCMD retransfer nil | sed 's/^/I:ns4 /'
 
 sleep 2
 
-tail -n +"$cur" < ns4/named.run | grep "Transfer status: expected a TSIG or SIG(0)" > /dev/null || {
+sed -n "$cur,\$p" < ns4/named.run | grep "Transfer status: expected a TSIG or SIG(0)" > /dev/null || {
     echo "I: failed: expected status was not logged"
     status=1
 }
@@ -297,7 +297,7 @@ $RNDCCMD retransfer nil | sed 's/^/I:ns4 /'
 
 sleep 2
 
-tail -n +"$cur" < ns4/named.run | grep "Transfer status: tsig verify failure" > /dev/null || {
+sed -n "$cur,\$p" < ns4/named.run | grep "Transfer status: tsig verify failure" > /dev/null || {
     echo "I: failed: expected status was not logged"
     status=1
 }
@@ -317,7 +317,7 @@ $RNDCCMD retransfer nil | sed 's/^/I:ns4 /'
 
 sleep 2
 
-tail -n +"$cur" < ns4/named.run | grep "Transfer status: expected a TSIG or SIG(0)" > /dev/null || {
+sed -n "$cur,\$p" < ns4/named.run | grep "Transfer status: expected a TSIG or SIG(0)" > /dev/null || {
     echo "I: failed: expected status was not logged"
     status=1
 }
@@ -337,7 +337,7 @@ $RNDCCMD retransfer nil | sed 's/^/I:ns4 /'
 
 sleep 2
 
-tail -n +"$cur" < ns4/named.run | grep "tsig key 'tsig_key': key name and algorithm do not match" > /dev/null || {
+sed -n "$cur,\$p" < ns4/named.run | grep "tsig key 'tsig_key': key name and algorithm do not match" > /dev/null || {
     echo "I: failed: expected status was not logged"
     status=1
 }
@@ -357,7 +357,7 @@ $RNDCCMD retransfer nil | sed 's/^/I:ns4 /'
 
 sleep 2
 
-tail -n +"$cur" < ns4/named.run | grep "tsig key 'tsig_key': key name and algorithm do not match" > /dev/null || {
+sed -n "$cur,\$p" < ns4/named.run | grep "tsig key 'tsig_key': key name and algorithm do not match" > /dev/null || {
     echo "I: failed: expected status was not logged"
     status=1
 }