Added logging of warnings for failed connections with ssl.
Fixed bug in symbolic link handling on Windows


include/my_global.h:
  Added replication flags from 4.1
mysql-test/r/func_group.result:
  Added test for SUM(NULL)
mysql-test/t/func_group.test:
  Added test for SUM(NULL)
sql/item_sum.cc:
  Fixed bug in SUM() with NULL:s
sql/item_sum.h:
  Fixed bug in SUM() with NULL:s
sql/mysqld.cc:
  Added option --symbolic-links
  Fixed bug in symbolic link handling on Windows
sql/net_serv.cc:
  Code cleanup
sql/sql_acl.cc:
  Added logging of warnings for failed connections with ssl.
sql/sql_show.cc:
  Changed to use HAVE_REPLICATION instead of EMBEDDED_LIBRARY