QMimeDatabase::mimeTypeForName(QString) is case-sensitive, other than RFC 2045 says

RFC 2045 says in "2. Definitions, Conventions, and Generic BNF Grammar":

All media type values, subtype values, and parameter names as defined are case-insensitive.

I have no other experience regarding the case sensitivity of MIME/Media types, but right now I interpret this text as in, the base of the MIME type identifier should be case insensitively handled.

Current implementation of QMimeDatabase though seems to do things case sensitive, see also attached example, which if build and run results in the following output:

"text/plain" -> QMimeType("text/plain")
"TEXT/PLAIN" -> QMimeType(invalid)

So: having QMimeDatabase::mimeTypeForName(QString) in the future dealing the name argument case-insensitive would be welcome