Merging 4.1 to 5.0.

BitKeeper/etc/ignore:
  auto-union
BitKeeper/etc/logging_ok:
  auto-union
client/mysqltest.c:
  Auto merged
configure.in:
  Auto merged
include/my_sys.h:
  Auto merged
include/mysql_com.h:
  Auto merged
libmysql/libmysql.c:
  Auto merged
libmysqld/Makefile.am:
  Auto merged
libmysqld/lib_sql.cc:
  Auto merged
myisam/mi_check.c:
  Auto merged
myisam/myisamchk.c:
  Auto merged
myisam/myisamdef.h:
  Auto merged
mysql-test/r/func_group.result:
  Auto merged
mysql-test/r/func_time.result:
  Auto merged
mysql-test/r/null.result:
  Auto merged
mysql-test/r/query_cache.result:
  Auto merged
mysql-test/r/rpl_server_id2.result:
  Auto merged
mysql-test/r/select.result:
  Auto merged
mysql-test/r/subselect.result:
  Auto merged
mysql-test/r/variables.result:
  Auto merged
mysql-test/t/rpl000015.test:
  Auto merged
mysql-test/t/rpl_error_ignored_table.test:
  Auto merged
mysql-test/t/rpl_log.test:
  Auto merged
mysql-test/t/rpl_log_pos.test:
  Auto merged
mysql-test/t/rpl_max_relay_size.test:
  Auto merged
mysql-test/t/rpl_relayrotate.test:
  Auto merged
mysql-test/t/rpl_rotate_logs.test:
  Auto merged
mysql-test/t/rpl_server_id2.test:
  Auto merged
mysql-test/t/subselect.test:
  Auto merged
mysql-test/t/variables.test:
  Auto merged
mysys/my_pthread.c:
  Auto merged
netware/BUILD/compile-netware-all:
  Auto merged
netware/BUILD/compile-netware-standard:
  Auto merged
netware/BUILD/mwenv:
  Auto merged
netware/Makefile.am:
  Auto merged
netware/my_manage.c:
  Auto merged
netware/my_manage.h:
  Auto merged
netware/mysql_test_run.c:
  Auto merged
scripts/mysql_install_db.sh:
  Auto merged
sql/Makefile.am:
  Auto merged
sql/ha_berkeley.cc:
  Auto merged
sql/ha_berkeley.h:
  Auto merged
sql/ha_innodb.cc:
  Auto merged
sql/ha_innodb.h:
  Auto merged
sql/ha_myisam.cc:
  Auto merged
sql/handler.cc:
  Auto merged
sql/handler.h:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_subselect.cc:
  Auto merged
sql/item_subselect.h:
  Auto merged
sql/item_sum.cc:
  Auto merged
sql/item_sum.h:
  Auto merged
sql/item_timefunc.cc:
  Auto merged
sql/lock.cc:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/protocol.cc:
  Auto merged
sql/protocol.h:
  Auto merged
sql/repl_failsafe.cc:
  Auto merged
sql/set_var.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_cache.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_db.cc:
  Auto merged
sql/sql_insert.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_prepare.cc:
  Auto merged
sql/sql_select.h:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/sql_string.cc:
  Auto merged
sql/sql_string.h:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_union.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
tests/client_test.c:
  Auto merged

sql/sql_string.h

@@ -190,13 +190,13 @@ public:
   bool copy(const char*s,uint32 arg_length, CHARSET_INFO *csfrom,
 	    CHARSET_INFO *csto);
   bool append(const String &s);
-  bool append(const char *s,uint32 arg_length=0);
+  bool append(const char *s);
+  bool append(const char *s,uint32 arg_length);
   bool append(const char *s,uint32 arg_length, CHARSET_INFO *cs);
   bool append(IO_CACHE* file, uint32 arg_length);
   bool append_with_prefill(const char *s, uint32 arg_length, 
 			   uint32 full_length, char fill_char);
   int strstr(const String &search,uint32 offset=0); // Returns offset to substring or -1
-  int strstr_case(const String &s,uint32 offset=0);
   int strrstr(const String &search,uint32 offset=0); // Returns offset to substring or -1
   bool replace(uint32 offset,uint32 arg_length,const char *to,uint32 length);
   bool replace(uint32 offset,uint32 arg_length,const String &to);
@@ -301,4 +301,7 @@ public:
     return FALSE;
   }
   void print(String *print);
+
+  /* Swap two string objects. Efficient way to exchange data without memcpy. */
+  void swap(String &s);
 };