ISQL bugs

SF #781610 Comments in ISQL using were causing problems.

fixed by J. Bellardo, B. Rodriguez Samoza

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Not registered ISQL_disconnect_database was overwriting the Quiet flag permanently.

fixed by M. Penchev, C. Valderrama

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SF #1208932 SHOW GRANT did not distinguish object types.

fixed by C. Valderrama

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SF #494981 Bad exception report.

fixed by C. Valderrama

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SF #450404 ISQL would uppercase role in the command line.

fixed by C. Valderrama

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Various, Not registered

1. Fix for the -b (Bail On Error) option when SQL commands are issued and no db connection exists yet.
2. Applied Miroslav Penchev's patch for bug with -Q always returning 1 to the operating system, discovered by Ivan Prenosil.

fixed by M. Penchev, C. Valderrama

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Not registered Metadata extraction for triggers, check constraints and views with check option was wrong.

fixed by C. Valderrama, D. Yemanov

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