- No RESTICT|CASCADE in DROP SP (since it's not implemented)
  - Added optional "noise" to FETCH: [[NEXT] FROM]
  - At least one statement required in all block constructs except BEGIN-END
    (where zero is allowed)


mysql-test/r/sp.result:
  Modified test cases for optional [[NEXT] FROM] in FETCH.
mysql-test/t/sp.test:
  Modified test cases for optional [[NEXT] FROM] in FETCH.
sql/sql_yacc.yy:
  Various syntax fixes for stored procedures:
    - No RESTICT|CASCADE in DROP SP (since it's not implemented)
    - Added optional "noise" to FETCH: [[NEXT] FROM]
    - At least one statement required in all block constructs except BEGIN-END
      (where zero is allowed)