Less verbose debugging (also don't log private keys)

Magicsig private keys were logged. That's probably not a good thing.
MagicEnvelope full XML entries no longer spam the log either.

plugins/OStatus/classes/Magicsig.php

@@ -224,8 +224,6 @@ class Magicsig extends Managed_DataObject
      */
     public function loadKey($mod, $exp, $type = 'public')
     {
-        common_log(LOG_DEBUG, "Adding ".$type." key: (".$mod .', '. $exp .")");
-
         $rsa = new Crypt_RSA();
         $rsa->setSignatureMode(CRYPT_RSA_SIGNATURE_PKCS1);
         $rsa->setHash($this->getHash());

plugins/OStatus/lib/magicenvelope.php

@@ -188,7 +188,6 @@ class MagicEnvelope
         $xs->elementEnd('me:env');
 
         $string =  $xs->getString();
-        common_debug('MagicEnvelope XML: ' . $string);
         return $string;
     }