added send/reap/dirty_close
include/mysql.h
    mysql_send_query()/mysql_reap_query()
libmysql/libmysql.c
    mysql_send_query()/mysql_reap_query()
mysys/my_vsnprintf.c
    fixed critical bug that codedumped when connection aborted
sql/sql_parse.cc
    0
mysql-test/r/dirty-close.result
    New BitKeeper file ``mysql-test/r/dirty-close.result''
mysql-test/t/dirty-close.test
    New BitKeeper file ``mysql-test/t/dirty-close.test''