SVG support

This is ready for review and has tests

Looks good to me. I've not been an active maintainer here since Drupal 6 so will defer to swentel for the next steps.

This doesn't work out of the box. You need to add "image/svg+xml" to imagecache_external_allowed_mimetypes in imagecache_external.settings

I think this should be either added as default or there should be an UI to enable this.

@tim_dj, indeed imagecache_external_allowed_mimetypes setting is not exposed in the admin form. But that is not an effect of this issue. I think you can open a follow-up to make this setting editable

@claudiu.cristea then at the very least this should be documented because now it just doesn't work out of the box and I had to debug to find the cause

Cool! I agree however, that the mimetype should be added to the settings as well.

I see 2 options:

1. an update hook: there's an existing one, 'imagecache_external_update_8103' which does this for image/webp.

2. Add the mimetype as soon as you configure the svg settings in the UI.

I kind of prefer number 2: add when you configure tags, remove when svg tags are removed.

It looks like something went wrong with the last merge in 3390948-svg (in , imagecache_external.module imagecache_sanitize_svg got removed).
I created a new 3390948-svg-2 branch, rebased on 3.0.x.