honor connect timeout indexer option for webapp check (#4220)

Author: vladak

opengrok-indexer/src/main/java/org/opengrok/indexer/index/Indexer.java

@@ -150,8 +150,6 @@ public final class Indexer {
     private static final String[] LUCENE_LOCKS = {ON, OFF, "simple", "native"};
     private static final String OPENGROK_JAR = "opengrok.jar";
 
-    private static final int WEBAPP_CONNECT_TIMEOUT = 3000;  // in milliseconds
-
     public static Indexer getInstance() {
         return indexer;
     }
@@ -174,7 +172,7 @@ public static void main(String[] argv) {
         try {
             argv = parseOptions(argv);
 
-            if (webappURI != null && !HostUtil.isReachable(webappURI, WEBAPP_CONNECT_TIMEOUT,
+            if (webappURI != null && !HostUtil.isReachable(webappURI, cfg.getConnectTimeout(),
                     cfg.getIndexerAuthenticationToken())) {
                 System.err.println(webappURI + " is not reachable and the -U option was specified, exiting.");
                 System.exit(1);