Fix for new bug in CREATE TABLE when sorting keys.


Docs/manual.texi:
  Added FOUND_ROWS() section.
include/my_base.h:
  Spatial index
include/myisam.h:
  Spatial index
include/mysql_com.h:
  Spatial index
myisam/ft_dump.c:
  Remove warnings.
mysys/hash.c:
  Fix for SUNPRO_C (Sun's Fortre compiler)
sql/sql_cache.cc:
  Fix for FLUSH QUERY CACHE.
sql/sql_cache.h:
  Fix for FLUSH QUERY CACHE.
sql/sql_table.cc:
  Fix for new bug when sorting keys.