Don't use DBUG library for struct st_my_thread_var to make code less complicated.


Docs/manual.texi:
  Cleanup
acinclude.m4:
  Search after openssl in /usr/local
client/mysql.cc:
  Fix prompt
client/mysqladmin.c:
  Cleanup
client/mysqltest.c:
  Cleanup
include/my_pthread.h:
  Move thread variables to the right location
include/my_sys.h:
  Move thread variables to the right location
include/mysql.h:
  Clean up client prototypes
libmysql/libmysql.c:
  Clean up client prototypes
mysys/my_static.h:
  Cleanup
mysys/my_thr_init.c:
  Don't use DBUG library for struct st_my_thread_var to make code less complicated
sql/item_cmpfunc.cc:
  Small optimization
sql/net_pkg.cc:
  Cleanup
sql/sql_parse.cc:
  Allow VARCHAR(0)