Setup: always show 401 Unauthorized errors

* also increase version code and version to 0.6.3

AndroidManifest.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="at.bitfire.davdroid"
-    android:versionCode="40"
-    android:versionName="0.6.2" android:installLocation="internalOnly">
+    android:versionCode="41"
+    android:versionName="0.6.3" android:installLocation="internalOnly">
 
     <uses-sdk
         android:minSdkVersion="14"

src/at/bitfire/davdroid/resource/DavResourceFinder.java

@@ -15,6 +15,7 @@ import at.bitfire.davdroid.R;
 import at.bitfire.davdroid.webdav.DavException;
 import at.bitfire.davdroid.webdav.DavHttpClient;
 import at.bitfire.davdroid.webdav.DavIncapableException;
+import at.bitfire.davdroid.webdav.NotAuthorizedException;
 import at.bitfire.davdroid.webdav.WebDavResource;
 import at.bitfire.davdroid.webdav.HttpPropfind.Mode;
 
@@ -127,15 +128,18 @@ public class DavResourceFinder {
 	 * @param serviceName	Well-known service name ("carddav", "caldav")
 	 * @return	WebDavResource of current-user-principal for the given service, or null if it can't be found
 	 */
-	private static WebDavResource getCurrentUserPrincipal(WebDavResource resource, String serviceName) throws IOException, HttpException, DavException {
+	private static WebDavResource getCurrentUserPrincipal(WebDavResource resource, String serviceName) throws IOException, NotAuthorizedException {
 		// look for well-known service (RFC 5785)
 		try {
 			WebDavResource wellKnown = new WebDavResource(resource, "/.well-known/" + serviceName);
 			wellKnown.propfind(Mode.CURRENT_USER_PRINCIPAL);
 			if (wellKnown.getCurrentUserPrincipal() != null)
 				return new WebDavResource(wellKnown, wellKnown.getCurrentUserPrincipal());
+		} catch (NotAuthorizedException e) {
+			Log.d(TAG, "Well-known " + serviceName + " service detection not authorized", e);
+			throw e;
 		} catch (HttpException e) {
-			Log.d(TAG, "well-known " + serviceName + " service detection failed with HTTP error", e);
+			Log.d(TAG, "Well-known " + serviceName + " service detection failed with HTTP error", e);
 		} catch (DavException e) {
 			Log.d(TAG, "Well-known " + serviceName + " service detection failed at DAV level", e);
 		}
@@ -145,6 +149,9 @@ public class DavResourceFinder {
 			resource.propfind(Mode.CURRENT_USER_PRINCIPAL);
 			if (resource.getCurrentUserPrincipal() != null)
 				return new WebDavResource(resource, resource.getCurrentUserPrincipal());
+		} catch (NotAuthorizedException e) {
+			Log.d(TAG, "Not authorized for querying principal for " + serviceName + " service", e);
+			throw e;
 		} catch (HttpException e) {
 			Log.d(TAG, "HTTP error when querying principal for " + serviceName + " service", e);
 		} catch (DavException e) {

src/at/bitfire/davdroid/webdav/NotAuthorizedException.java

@@ -0,0 +1,12 @@
+package at.bitfire.davdroid.webdav;
+
+import org.apache.http.HttpStatus;
+
+public class NotAuthorizedException extends HttpException {
+	private static final long serialVersionUID = 2490525047224413586L;
+
+	public NotAuthorizedException(String reason) {
+		super(HttpStatus.SC_UNAUTHORIZED, reason);
+	}
+	
+}

src/at/bitfire/davdroid/webdav/WebDavResource.java

@@ -416,6 +416,8 @@ public class WebDavResource {
 		
 		String reason = code + " " + statusLine.getReasonPhrase();
 		switch (code) {
+		case HttpStatus.SC_UNAUTHORIZED:
+			throw new NotAuthorizedException(reason);
 		case HttpStatus.SC_NOT_FOUND:
 			throw new NotFoundException(reason);
 		case HttpStatus.SC_PRECONDITION_FAILED: