Portability fixes (mostly test suite)

Make ENGINE= an alias for TYPE= (Compabiltiy with 4.1)
Fix when using symlinked data files and realpath() is not working


client/mysqltest.c:
  Copied mysqltest from 4.1 and modified this to compile in 4.0
  This was needed to get replace_columns to work.
include/my_sys.h:
  Stop compiler warnings about alloca on freebsd
myisam/mi_check.c:
  Fix when using symlinked data files and realpath() is not working
mysql-test/r/handler.result:
  test engine=
mysql-test/r/rpl_max_relay_size.result:
  Use replace_columns to replace some 'not constant' columns
mysql-test/r/rpl_rotate_logs.result:
  Use replace_columns to replace some 'not constant' columns
mysql-test/r/rpl_trunc_binlog.result:
  Use replace_columns to replace some 'not constant' columns
mysql-test/t/handler.test:
  test engine=
mysql-test/t/rpl_log_pos.test:
  Use replace_columns to replace some 'not constant' columns
mysql-test/t/rpl_max_relay_size.test:
  Use replace_columns to replace some 'not constant' columns
mysql-test/t/rpl_rotate_logs.test:
  Use replace_columns to replace some 'not constant' columns
mysql-test/t/rpl_trunc_binlog.test:
  Use replace_columns to replace some 'not constant' columns
mysys/my_symlink.c:
  More debugging
sql/lex.h:
  Make ENGINE= an alias for TYPE=
sql/mysqld.cc:
  Code cleanup
strings/strto.c:
  Fix for True64
strings/strtoll.c:
  Fix for True64
strings/strtoull.c:
  Remove not needed include file

mysql-test/r/handler.result

@@ -142,7 +142,7 @@ insert into t1 values (17);
 handler t2 read first;
 Unknown table 't2' in HANDLER
 handler t1 open as t2;
-alter table t1 type=MyISAM;
+alter table t1 engine=MyISAM;
 handler t2 read first;
 Unknown table 't2' in HANDLER
 drop table t1;