SpringBoot A URI with non-alpha characters in its scheme is not sanitized

The Sanitizer.java class infers that the scheme portion of a URI can only contain letters, but as described in RFC2396 it can follow:

scheme = alpha *( alpha | digit | "+" | "-" | "." )

We have a use case where a valid URI with the scheme mongodb+sr, won't get the password token sanitized due to the current regex pattern.

Comment From: pivotal-cla

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Comment From: pivotal-cla

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Comment From: wilkinsona

Thanks very much for making your first contribution to Spring Boot, @billyto.