fixed potential overflow in wellknown handler #59
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Prior to this change,
/.well-known/coreresource was prone to buffer overflow depending on the configuration.Safe append functions were introduced to construct the result value in proper way.
isBufferOkwas added for an early exit in case of the buffer is full, but it was introduced for performance only and is not needed for safe operation.The solution was tested using an existing project to make sure that it doesn't change the result.