embedded library
I decided to get rid of #define mysql_some_function in mysql.h
It puzzles users and makes problems with dynamic libraries

Finally, there are only two functions left, that are covered with
the #define-s and it won't hurt performance at all


client/mysqltest.c:
  that'll be faster
include/mysql.h:
  #defines changed to functions
libmysql/libmysql.c:
  that'll be faster that calls of wrapper functions
libmysqld/libmysqld.c:
  skip wrapper function
sql-common/client.c:
  skip wrapper function