mysqld.cc:
  Changed LOGLEVEL enum to loglevel
mysql_priv.h, log.cc:
  Changed LOGLEVEL to loglevel.  Removed startup_ from some of the DBUG_ENTER macros. Removed the print_msg_to_log function as it was unused.
my_getopt.c, my_getopt.h:
  Renamed LOGLEVEL to loglevel to match coding standards