Many mime types not recognized

[ivanjaros]

Like audio/wav won't match the audio/x-wav even though it is perfectly valid mime type.
The matchers are too strict when there are multiple variants for many mime types that are valid.

var (
	TypeMidi = newType("mid", "audio/midi")
	TypeMp3  = newType("mp3", "audio/mpeg")
	TypeM4a  = newType("m4a", "audio/m4a")
	TypeOgg  = newType("ogg", "audio/ogg")
	TypeFlac = newType("flac", "audio/x-flac") <---
	TypeWav  = newType("wav", "audio/x-wav") <---
	TypeAmr  = newType("amr", "audio/amr")
	TypeAac  = newType("aac", "audio/aac")
	TypeAiff = newType("aiff", "audio/x-aiff") <---
)

var (
	TypeMp4  = newType("mp4", "video/mp4")
	TypeM4v  = newType("m4v", "video/x-m4v") <---
	TypeMkv  = newType("mkv", "video/x-matroska") <---
	TypeWebm = newType("webm", "video/webm")
	TypeMov  = newType("mov", "video/quicktime")
	TypeAvi  = newType("avi", "video/x-msvideo") <---
	TypeWmv  = newType("wmv", "video/x-ms-wmv") <---
	TypeMpeg = newType("mpg", "video/mpeg")
	TypeFlv  = newType("flv", "video/x-flv") <---
	Type3gp  = newType("3gp", "video/3gpp")
)

This makes IsMIMESupported unusable. For example when uploading files from web browsers. The mime won't match and upload fails.