Added notes where to reuse old keys instead of generating new ones

apps/files_encryption/lib/stream.php

@@ -318,6 +318,7 @@ class Stream {
 		// one), save the newly generated keyfile
 		if ( ! $this->getKey() ) {
 		
+			// TODO: Reuse the keyfile, it it exists, instead of making a new one
 			$this->keyfile = Crypt::generateKey();
 			
 			$this->publicKey = Keymanager::getPublicKey( $this->rootView, $this->userId );

apps/files_encryption/lib/util.php

@@ -692,6 +692,7 @@ class Util {
 		
 		// Save the recrypted key to it's owner's keyfiles directory
 		// Save new sharekeys to all necessary user directory
+		// TODO: Reuse the keyfile, it it exists, instead of making a new one
 		if ( 
 			! Keymanager::setFileKey( $this->view, $filePath, $fileOwner, $multiEncKey['data'] )
 			|| ! Keymanager::setShareKeys( $this->view, $filePath, $multiEncKey['keys'] )