`MIMEDocument class>>#guessTypeFromName:` failed for png images

[dram]

In Squeak 6.0, MIMEDocument class>>#guessTypeFromName: failed to guess MIME type for png image files, i.e.:

MIMEDocument guessTypeFromName: 'foo.png' => 'application/octet-stream' 

Which should be image/png.

[dram]

Seems that MIME database is not consistent between code and image, after reset, it works:

MIMEDocument resetMIMEdatabase.
MIMEDocument guessTypeFromName: 'foo.png' => 'image/png'

[marceltaeumel]

Fixed via Network-mt.261.

[dram]

Fix confirmed, thanks!