Support for <c>...</c> in XML-Comments

Hi Rico,

when documenting my APIs I sometimes add text enclosed in <c>...</c> tags to show some kind of constant values. Visual Studios IntelliSense displays the text between the tags using a monospaced font. It's comparable to the markdown notation of `...`.

At the moment, the SwaggerUI doesn't support <c>...</c> but it already does support the markdown notation.

Please add support for <c>...</c> too.

Thanks in advance! Max