New HEX() function.
Final (?) cleanup of des_encrypt() / des_decrypt().
Added missing files to Makefiles.


Docs/Makefile.am:
  Add missing files
Docs/manual.texi:
  Added information about HEX() and des_encrypt() / des_decrypt().
include/mysql_com.h:
  Added FLUSH DES_KEY_FILE
myisam/ft_update.c:
  Removed compiler warnings
mysql-test/mysql-test-run.sh:
  Fixes needed for des_key tests.
mysql-test/r/func_crypt.result:
  Moved crypt test from func_str to func_crypt
mysql-test/r/func_encrypt.result:
  Moved crypt test from func_str to func_crypt
mysql-test/r/func_str.result:
  Moved crypt test from func_str to func_crypt
mysql-test/t/func_crypt.test:
  Moved crypt test from func_str to func_crypt
mysql-test/t/func_encrypt.test:
  New tests
mysql-test/t/func_str.test:
  Moved crypt test from func_str to func_crypt
sql/des_key_file.cc:
  Changes needed for FLUSH DES_KEY_FILE
sql/item_create.cc:
  New HEX() function
sql/item_strfunc.cc:
  Changes needed for FLUSH DES_KEY_FILE
sql/item_strfunc.h:
  New HEX() function
sql/item_timefunc.cc:
  cleanup
sql/lex.h:
  FLUSH DES_KEY_FILE
sql/mysql_priv.h:
  FLUSH DES_KEY_FILE
sql/mysqld.cc:
  FLUSH DES_KEY_FILE
sql/sql_parse.cc:
  Cleanup sql_yacc.yy
sql/sql_yacc.yy:
  Cleanup sql_yacc.yy