International character set bugs

SF #1016040 Missing external libraries would cause an engine exception.

fixed by A. dos Santos Fernandes

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Not registered

1. Charset/collation issues for expression-based view columns.
2. Lost charset/collation for local PSQL variables.

fixed by D. Yemanov

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Not registered Comparisons between strings in NONE and another character set would cause an error.

fixed by D. Yemanov, A. dos Santos Fernandes

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SF #1244126 There was a problem updating some text BLOBs when connected with character set NONE.

fixed by A. dos Santos Fernandes

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SF #1242379 Applying a collation could change a VARCHAR's length

fixed by A. dos Santos Fernandes

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