The ContentType implementation of IContentType.isAssociatedWith is case insensitive and I find no case sensitive alternative

The ContentType implementation of IContentType.isAssociatedWith is case insensitive which means that if your content type contains .c and the presented file is a .C file ContentType.isAssociatedWith will return true.

There are 2 locations where ContentType.isAssociatedWith uses equalsIgnoreCase
https://github.com/eclipse-platform/eclipse.platform/blob/f385650ab42fb7275ab164643fe2d1db5040750e/runtime/bundles/org.eclipse.core.contenttype/src/org/eclipse/core/internal/content/FileSpec.java#L53
and
https://github.com/eclipse-platform/eclipse.platform/blob/f385650ab42fb7275ab164643fe2d1db5040750e/runtime/bundles/org.eclipse.core.contenttype/src/org/eclipse/core/internal/content/ContentType.java#L385

Unfortunately for me .c files are associated with c compilers and .C files are associated with C++ compilers which means CDT can not use ContentType.isAssociatedWith and chose to implemented a private method to provide the functionality.
https://github.com/eclipse-cdt/cdt/blob/7c8bb9f00ef0d5e3ff493bc0c944519a3e476da2/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CContentTypes.java#L130

As I need a case sensitive implementation of IContentType.isAssociatedWith I have the option to make the private method of CDT public or have a solution in (I)ContentType.
I'd prefer the second.

Note 1) I did not find any documentation that says the comparison is case insensitive.
Note 2) I think file name comparison is case insensitive as well.
Note 3) I can create a PR but I need some guidance on what the change should look like.

Beginne damit, die Verwendungen von equalsIgnoreCase in runtime/bundles/org.eclipse.core.contenttype/src/org/eclipse/core/internal/content/FileSpec.java und ContentType.java zu lesen, und vergleiche anschließend die groß-/kleinschreibungssensitive Logik in CDTs CContentTypes.java. Als abgeschlossen gilt die Aufgabe, wenn die Content-Type-API einen dokumentierten, groß-/kleinschreibungssensitiven Zuordnungspfad bereitstellt, ohne den privaten Workaround von CDT zu erfordern.

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