Fix more typos in comments.

Patch by CharSyam, plus a few more I spotted with grep.

src/backend/access/transam/twophase.c

@@ -269,7 +269,7 @@ AtAbort_Twophase(void)
 	 * can be finished later, so just unlock it.
 	 *
 	 * If we abort during prepare, after having written the WAL record, we
-	 * might not have transfered all locks and other state to the prepared
+	 * might not have transferred all locks and other state to the prepared
 	 * transaction yet.  Likewise, if we abort during commit or rollback,
 	 * after having written the WAL record, we might not have released
 	 * all the resources held by the transaction yet.  In those cases, the

src/backend/access/transam/xact.c

@@ -2317,7 +2317,7 @@ PrepareTransaction(void)
 	/*
 	 * In normal commit-processing, this is all non-critical post-transaction
 	 * cleanup.  When the transaction is prepared, however, it's important that
-	 * the locks and other per-backend resources are transfered to the
+	 * the locks and other per-backend resources are transferred to the
 	 * prepared transaction's PGPROC entry.  Note that if an error is raised
 	 * here, it's too late to abort the transaction. XXX: This probably should
 	 * be in a critical section, to force a PANIC if any of this fails, but