Patch to log credential lookup in TouchDB.

patch.diff

diff --git a/MYURLUtils.m b/MYURLUtils.m
index 2e3e333..db9b514 100644
--- a/MYURLUtils.m
+++ b/MYURLUtils.m
@@ -63,10 +63,14 @@
     NSURLProtectionSpace* space = [self my_protectionSpaceWithRealm: realm
                                                authenticationMethod: authenticationMethod];
     NSURLCredentialStorage* storage = [NSURLCredentialStorage sharedCredentialStorage];
+    NSURLCredential* cred;
     if (username)
-        return [[storage credentialsForProtectionSpace: space] objectForKey: username];
+        cred = [[storage credentialsForProtectionSpace: space] objectForKey: username];
     else
-        return [storage defaultCredentialForProtectionSpace: space];
+        cred = [storage defaultCredentialForProtectionSpace: space];
+    Log(@"*** my_credentialForRealm: URL=<%@>, realm='%@', method=%@ --> %@",
+        self.absoluteString, realm, authenticationMethod, cred);
+    return cred;
 }