Sei Lisa 43beb767f2 Fix llBase64ToString's behaviour with invalid UTF-8. ...

llBase64ToString doesn't behave like llUnescapeURL wrt invalid UTF-8. First, the last NUL if any is removed, and the remaining NULs are converted to "?". Second, all overlong sequences are converted to a single "?", *including the 5- and 6-byte UTF-8*.

Implement this behavour and the corresponding unit tests.

2016-12-13 15:04:02 +01:00

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