use variables to support other IPs and port numbers

tests/data/test1029

@@ -30,10 +30,6 @@ HTTP Location: and 'redirect_url' check
  <command>
 http://%HOSTIP:%HTTPPORT/we/want/our/1029 -w '%{redirect_url}\n'
 </command>
-# The stdout section doesn't do variable substitution, so we must assert this
-<precheck>
-perl -e "print 'Test requires default test server host and port' if ( '%HOSTIP' ne '127.0.0.1' || '%HTTPPORT' ne '8990' );"
-</precheck>
 </client>
 
 # Verify data after the test has been "shot"
@@ -54,7 +50,7 @@ Content-Length: 62
 Connection: close
 
 This server reply is for testing a simple Location: following
-http://127.0.0.1:8990/we/want/our/data/10290002.txt?coolsite=yes
+http://%HOSTIP:%HTTPPORT/we/want/our/data/10290002.txt?coolsite=yes
 </stdout>
 </verify>
 </testcase>