Fixed error number handling bug in mysqltest.
Fixed that error number from insert delayed is reported correctly.
merged new vio code with old violite code.


client/mysqltest.c:
  Fixed bug that error numbers wasn't tested properly.
myisam/mi_check.c:
  Moved initialization of variables to avoid a bug.
myisam/mi_create.c:
  Fixed bug in symlink handling.
myisam/mi_test_all.sh:
  Fixed script so that it works.
myisam/myisamchk.c:
  Removed --no-symlinks option
mysql-test/mysql-test-run.sh:
  Cleaned up error message
mysql-test/t/bdb.test:
  Fixed wrong error numbers
mysql-test/t/err000001.test:
  Fixed wrong error numbers
mysql-test/t/innodb.test:
  Fixed wrong error numbers
mysql-test/t/overflow.test:
  Fixed wrong error numbers
mysql-test/t/status.test:
  Ensure that we are using myisam tables for the lock test.
mysys/my_delete.c:
  cleanup
mysys/my_symlink2.c:
  Added option to not overwrite files when using symlinks.
sql/Makefile.am:
  Moved vio to avoid link error.
sql/ha_myisam.cc:
  Fixed symlink handling.
sql/mysqld.cc:
  Changed --skip-symlinks to --skip-symlink
sql/sql_insert.cc:
  Fixed that error number from insert delayed is reported correctly
sql/sql_parse.cc:
  Fixed symlink handling.
sql/sql_table.cc:
  Fixed symlink handling.
vio/vio.c:
  cleanup
vio/viosocket.c:
  c