Fallback to PROPFIND when REPORT addressbook-query returns 400, 403, 500 or 501

* increase max. log line length to 80 characters

app/src/main/java/at/bitfire/davdroid/HttpClient.java

@@ -33,7 +33,7 @@ import de.duenndns.ssl.MemorizingTrustManager;
 import lombok.RequiredArgsConstructor;
 
 public class HttpClient extends OkHttpClient {
-    private final int MAX_LOG_LINE_LENGTH = 71;
+    private final int MAX_LOG_LINE_LENGTH = 80;
 
     final static UserAgentInterceptor userAgentInterceptor = new UserAgentInterceptor();
 

app/src/main/java/at/bitfire/davdroid/syncadapter/ContactsSyncManager.java

@@ -117,7 +117,13 @@ public class ContactsSyncManager extends SyncManager {
         try {
             davAddressBook().addressbookQuery();
         } catch(HttpException e) {
-            if (e.status/100 == 4) {
+            /*  non-successful responses to CARDDAV:addressbook-query with empty filter, tested on 2015/10/21
+             *  fastmail.com                 403 Forbidden (DAV:error CARDDAV:supported-filter)
+             *  mailbox.org (OpenXchange)    400 Bad Request
+             *  SOGo                         207 Multi-status, but without entries       http://www.sogo.nu/bugs/view.php?id=3370
+             *  Zimbra ZCS                   500 Server Error                            https://bugzilla.zimbra.com/show_bug.cgi?id=101902
+             */
+            if (e.status == 400 || e.status == 403 || e.status == 500 || e.status == 501) {
                 log.warn("Server error on REPORT addressbook-query, falling back to PROPFIND", e);
                 davAddressBook().propfind(1, GetETag.NAME);
             } else