Replace with a parser which actually does the job right, fixing
various infelicities in the parsing in the process.
Make the parser strict about formatting.
Adjusted tests to match. Fixed some QTime invalidity tests to each
test only one invalidity at a time (the invalid year and day tests
also used an invalid month).
[ChangeLog][QtCore][QDateTime] The parser for the Qt::RFC2822Date
format is now stricter, requiring the text to exactly match the form
of one of the relevant formats. A valid date or time will still be
parsed, even if the other part of the content is invalid, as long as
it (and any offset, if present) has the right form. In particular, the
parser now rejects texts with trailing cruft (other than space).
Fixes: QTBUG-80038
Change-Id: Id25675afd75f82f6351f20e79f0154f3ceda35ac
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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