1.0.9dev: Adds `nginx` keywords to known mimetypes.
1.0.9dev: Adds `nginx` keywords to known mimetypes.

As in [14277], this avoids a WikiProcessor error in the TracGuide when Pygments is not installed. Refs #12183.


git-svn-id: 50cd48c816abc7a9f40e8e03a4277466cb30a3e4@14285 af82e41b-90c4-0310-8c96-b1721e28e2e2

rbaumg/trac,rbaumg/trac,rbaumg/trac,rbaumg/trac