This patch deprecates the replication startup options in the configuration
file and on the command line. The options deprecated include:

MASTER_HOST, MASTER_USER, MASTER_PASSWORD, MASTER_PORT, MASTER_CONNECT_RETRY,
MASTER_SSL, MASTER_SSL_CA, MASTER_SSL_CAPATH, MASTER_SSL_CERT, MASTER_SSL_KEY,
and MASTER_SSL_CIPHER

The code is designed to print the warning message once.


sql/mysql_priv.h:
  BUG#21490 - No warning issued for deprecated replication parameters
  This patch modifies the WARN_DEPRECATED macro to permit displaying a deprecated 
  warning to the user at startup when the replication startup options are detected.
  It displays the same messae as the original version of the macro but allows the 
  macro to be called before a thread is created and the ER() macro is defined.