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Description
When an Azure Egress provider is enabled with a blobPrefix and queueName+queueAccountUri the quote characters (' and ") in the blobPrefix will be handled by blob storage, however, they will not be encoded correctly in the queue message.
Azure Queues allow any characters that are no XML special characters. Blob Names are allowed to be anything that is not URL reserved.
We should probably add a Regex filter to blobPrefix that prevents people from defining blob prefixes with XML characters because they would work for blobs but cause problems with queues.
Proposed regex: ^[^<>"'&]+$
Really Strict regex: ^[a-zA-Z0-9\-_\.]+$