Fix typos

src/backend/access/transam/clog.c

@@ -419,7 +419,7 @@ TransactionIdGetStatus(TransactionId xid, XLogRecPtr *lsn)
  *
  * Testing during the PostgreSQL 9.2 development cycle revealed that on a
  * large multi-processor system, it was possible to have more CLOG page
- * requests in flight at one time than the numebr of CLOG buffers which existed
+ * requests in flight at one time than the number of CLOG buffers which existed
  * at that time, which was hardcoded to 8.  Further testing revealed that
  * performance dropped off with more than 32 CLOG buffers, possibly because
  * the linear buffer search algorithm doesn't scale well.

src/backend/access/transam/xloginsert.c

@@ -299,7 +299,7 @@ XLogRegisterBlock(uint8 block_id, RelFileNode *rnode, ForkNumber forknum,
  * Add data to the WAL record that's being constructed.
  *
  * The data is appended to the "main chunk", available at replay with
- * XLogGetRecData().
+ * XLogRecGetData().
  */
 void
 XLogRegisterData(char *data, int len)

src/include/access/rmgrlist.h

@@ -24,7 +24,7 @@
  * Changes to this list possibly need a XLOG_PAGE_MAGIC bump.
  */
 
-/* symbol name, textual name, redo, desc, startup, cleanup */
+/* symbol name, textual name, redo, desc, identify, startup, cleanup */
 PG_RMGR(RM_XLOG_ID, "XLOG", xlog_redo, xlog_desc, xlog_identify, NULL, NULL)
 PG_RMGR(RM_XACT_ID, "Transaction", xact_redo, xact_desc, xact_identify, NULL, NULL)
 PG_RMGR(RM_SMGR_ID, "Storage", smgr_redo, smgr_desc, smgr_identify, NULL, NULL)