Avoid memory overruns when buffer_length is too small (when fetching binary data in prepared statements)


include/errmsg.h:
  Remove compiler warning
libmysql/libmysql.c:
  Avoid memory overruns when buffer_length is too small
libmysqld/lib_sql.cc:
  Fixed function name
sql/mysqld.cc:
  Code cleanup; Added back shared memory support (which was accidently deleted)
sql/sql_parse.cc:
  Clean up multi-query