Proposal to fix this problem: when using libmysqlclient, you must call mysql_server_end() to nicely free memory at the end
of your program; it however sounds weird to call a function named *SERVER_end* when you're the CLIENT (you're not ending the server, you're ending
your ability to talk to servers). So here I add two defines which should be more generic names. Our manual
mentions these functions only for libmysqld API so needs some fixing, and then we can close BUG#8099 and BUG#6149.