Also see configuration values by category, alphabetical index of values, other configuration files and content types.
type/subtype list of extensions
text/html html htm
the .html and .htm file extensions represent the content type of
The file may contain many lines with each line containing one type/subtype entry with zero to many extensions. An entry with no extensions listed is considered a non-configured content type however it is recommended to leave these type/subtype entries within the file for future references.