more explanation

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7522 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/net/yacy/cora/protocol/http/HTTPClient.java

@@ -272,7 +272,7 @@ public class HTTPClient {
     public byte[] GETbytes(final String uri, long maxBytes) throws IOException {
         final MultiProtocolURI url = new MultiProtocolURI(uri);
     	final HttpGet httpGet = new HttpGet(url.toNormalform(true, false, true, false));
-    	httpGet.setHeader("Host", url.getHost()); // overwrite resolved IP
+    	httpGet.setHeader("Host", url.getHost()); // overwrite resolved IP, needed for shared web hosting DO NOT REMOVE, see http://en.wikipedia.org/wiki/Shared_web_hosting_service
     	return getContentBytes(httpGet, maxBytes);
     }
     
@@ -288,7 +288,7 @@ public class HTTPClient {
         if (currentRequest != null) throw new IOException("Client is in use!");
         final MultiProtocolURI url = new MultiProtocolURI(uri);
         final HttpGet httpGet = new HttpGet(url.toNormalform(true, false, true, false));
-        httpGet.setHeader("Host", url.getHost()); // overwrite resolved IP
+        httpGet.setHeader("Host", url.getHost()); // overwrite resolved IP, needed for shared web hosting DO NOT REMOVE, see http://en.wikipedia.org/wiki/Shared_web_hosting_service
         currentRequest = httpGet;
         execute(httpGet);
     }
@@ -303,7 +303,7 @@ public class HTTPClient {
     public HttpResponse HEADResponse(final String uri) throws IOException {
         final MultiProtocolURI url = new MultiProtocolURI(uri);
         final HttpHead httpHead = new HttpHead(url.toNormalform(true, false, true, false));
-        httpHead.setHeader("Host", url.getHost()); // overwrite resolved IP
+        httpHead.setHeader("Host", url.getHost()); // overwrite resolved IP, needed for shared web hosting DO NOT REMOVE, see http://en.wikipedia.org/wiki/Shared_web_hosting_service
     	execute(httpHead);
     	finish();
     	ConnectionInfo.removeConnection(httpHead.hashCode());
@@ -324,7 +324,7 @@ public class HTTPClient {
     	if (currentRequest != null) throw new IOException("Client is in use!");
         final MultiProtocolURI url = new MultiProtocolURI(uri);
         final HttpPost httpPost = new HttpPost(url.toNormalform(true, false, true, false));
-        httpPost.setHeader("Host", url.getHost()); // overwrite resolved IP
+        httpPost.setHeader("Host", url.getHost()); // overwrite resolved IP, needed for shared web hosting DO NOT REMOVE, see http://en.wikipedia.org/wiki/Shared_web_hosting_service
     	final InputStreamEntity inputStreamEntity = new InputStreamEntity(instream, length);
     	// statistics
     	upbytes = length;
@@ -344,7 +344,7 @@ public class HTTPClient {
     public byte[] POSTbytes(final String uri, final Map<String, ContentBody> parts, final boolean usegzip) throws IOException {
         final MultiProtocolURI url = new MultiProtocolURI(uri);
         final HttpPost httpPost = new HttpPost(url.toNormalform(true, false, true, false));
-        httpPost.setHeader("Host", url.getHost()); // overwrite resolved IP
+        httpPost.setHeader("Host", url.getHost()); // overwrite resolved IP, needed for shared web hosting DO NOT REMOVE, see http://en.wikipedia.org/wiki/Shared_web_hosting_service
 
     	final MultipartEntity multipartEntity = new MultipartEntity();
     	for (final Entry<String,ContentBody> part : parts.entrySet())