+'MimeMagicInit': Before processing the list mapping MIME types to media types
+and the list mapping MIME types to file extensions.
+As an extension author, you are encouraged to submit patches to MediaWiki's
+core to add new MIME types to mime.types.
+$mimeMagic: Instance of MimeMagic.
+ Use $mimeMagic->addExtraInfo( $stringOfInfo );
+ for adding new MIME info to the list.
+ Use $mimeMagic->addExtraTypes( $stringOfTypes );
+ for adding new MIME types to the list.
+
+'MimeMagicImproveFromExtension': Allows MW extensions to further improve the
+MIME type detected by considering the file extension.
+$mimeMagic: Instance of MimeMagic.
+$ext: File extension.
+&$mime: MIME type (in/out).
+
+'MimeMagicGuessFromContent': Allows MW extensions guess the MIME by content.
+$mimeMagic: Instance of MimeMagic.
+&$head: First 1024 bytes of the file in a string (in - Do not alter!).
+&$tail: More or equal than last 65558 bytes of the file in a string
+ (in - Do not alter!).
+$file: File path.
+&$mime: MIME type (out).
+